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Research Article
 

Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants



W. Yana, J.L. Tamesse and D. Burckhardt
 
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ABSTRACT

The prospections undertaken in the center province of Cameroon permitted to study the biodiversity of psyllids of the Psyllidae family. The psyllids were sampled during a period of 24 months (January 2006-December 2007) in different localities on various host plants. The damages caused by the psyllids on their host plants were recorded and photographed. This survey documented 45 species belonging to 24 genera and 7 subfamilies. Nine genera and 36 species remain undescribed. The proliferation period of each species depends on the phenology of host plants. In the center region of Cameroon, the Fabaceae constitutes the family with the largest number of associated psyllid species. The present survey permitted to enrich the biodiversity of the psyllids of the Psyllidae family. It is important to study the taxonomy of undescribed psyllids species and the bionomic of these psyllids, pests of cultivated plants and commercial timbers in the center region of Cameroon.

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  How to cite this article:

W. Yana, J.L. Tamesse and D. Burckhardt, 2010. Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants. Journal of Entomology, 7: 1-18.

DOI: 10.3923/je.2010.1.18

URL: https://scialert.net/abstract/?doi=je.2010.1.18
 

INTRODUCTION

Cameroon is situated between latitudes 2° and 13° North and longitudes 9° and 16° East. It is divided into ten administrative regions: Adamaoua, Center, East, Far-North, Littoral, North, North-West, West, South and South-West. The center region (68,953 km2) is dominated by an equatorial climate with four seasons: two rainy seasons (August-November; March-July) and two dry seasons (November-March; July-August). In the center region, the vegetation consists mainly of forest and savannah both with rich and diversified vegetation. Some of the plants are used as commercial timber or for pharmaceutical and ethnobotanical purposes. These plants, in particular new growth and young plants are often attacked by a variety of insects (Tamesse, 2005).

Among these insect pests are the plant sap-sucking jumping plant-lice or psylloids (Hemiptera, Psylloidea) which are predominantly associated with dicotyledons (Hodkinson, 1974; Burckhardt, 1994, 2005; Hollis, 2004). Psyllids can cause damage to their hosts in various ways: the removal of large quantities of plant sap, when psyllid populations are high; the induction of leaf necrosis or abortive terminal buds by inserting their mouth parts into plant tissue; the deformation of leaves, buds or flowers including induction of galls; the soiling of leaves, flowers or fruits by secreting honeydew which may stimulate fungal growth; the transmission of phytoplasmal or viral diseases. The most serious damage is caused by larvae or by adults transmitting plant diseases.

The world fauna comprises currently some 3000-3500 described psylloid species, though this may represent less than half the number of existing species. Psylloids are probably most species rich in the tropics and South temperate regions but the fauna from these regions is only incompletely known. For the Afrotropical region not much taxonomic literature is available; the most important publications are by Vondracek (1963), Capener (1968, 1970, 1973), Hollis (1984, 1987), Hollis and Broomfield (1989), Burckhardt and Mifsud (2003), Burckhardt et al. (2006), Alene et al. (2007) and Malenovsky and Burckhardt (2009). Cameroon is no exception in this respect for which only very few contributions exist such as Messi and Nguefang (1993), Messi et al. (1998a, b), Tamesse et al. (2007), Malenovsky et al. (2007) or Tamesse (2005), who recorded 68 psylloid species from Cameroon.

Since 2005, regular surveys on psylloids were conducted in several Regions in Cameroon. Here we report the results from these surveys from the Center Region with respect to the family Psyllidae as defined by Burckhardt (1987), a species rich and probably polyphyletic taxon (Burckhardt, 2005).

MATERIALS AND METHODS

The psyllids were sampled during a period of 24 months (January 2006-December 2007) in different localities of the center region of Cameroon (Table 1). Four sites were chosen for regular monthly prospections: Kala, Minkoameyos, Nkomilong and Soa. Additional localities were visited occasionally.

Adult psyllids were captured with a sweep net of 0.5 mm mesh size and an aspirator. Larvae were sampled directly from buds and leaves of the host plant. All specimens were preserved in 70% ethanol. The damage caused by the psyllids on the host plants was recorded and photographed. Specimens of the host plant were taken for identification by botanists of the University of Yaounde I and the National Herbarium in Yaounde.

At the Laboratory of Zoology of the Higher Teacher’s Training College of the University of Yaounde I, where parts of the material is preserved, the insects were examined under a stereomicroscope, sorted to species and provisionally identified using psyllid identification keys.


Table 1: List of localities in Cameroon, center region where psyllids were collected with altitudes and geographical coordinates
Image for - Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants

Representatives of all species were examined at the Naturhistorisches Museum Basel, Switzerland, where detailed taxonomic studies were done. A collection of dry and slide mounted specimens as well as material preserved in 70% ethanol is preserved in this institution.

RESULTS

During the survey 9212 specimens (2685 males, 3074 females and 3453 larvae) of Psyllidae were captured representing 7 subfamilies, 24 genera and 45 species. Host plants of 37 psyllid species could be recorded; those of 8 species remain unknown.

Subfamily Aphalaroidinae Loginova (1964)
Genus Yangus Fang (1990)
Yangus sp. 1 (host plant: Albizia ferruginea, Fabaceae): Bialanguena: 18 viii 2007, 6 males, 6 females. Kala: 24 i 2006, 6 females; 22 iii 2006, 7 males, 8 females, 6 larvae; 27 iv 2006, 5 males, 2 females; 26 v 2006, 3 males, 5 females; 28 vi 2006, 7 males, 8 females, 1 larva; 28 vii 2006, 7 males, 6 females, 6 larvae; 28 viii 2006, 7 females, 4 larvae; 23 iii 2007, 5 females; 27 iv 2007, 12 males, 12 females, 4 larvae; 25 v 2007, 2 males, 14 females; 27 vi 2007, 3 males, 4 females; 22 ix 2007, 1 male, 1 female. Minkoameyos: 27 v 2007, 4 male, 9 females, 1 larva. Soa: 18 ii 2006, 2 males, 2 females; 12 ii 2007, 1 female; 24 iii 2007, 3 males, 9 females, 1 larva; 23 iv 2007, 10 males, 9 females, 5 larvae; 31 v 2007, 4 males, 1 larva; 26 vi 2007, 1 male, 4 females, 1 larva; 28 xii 2007, 1 male, 2 females.

Yangus sp. 2 (host plant: Albizia glaberrima, Fabaceae): Leboth: 28 iii 2006, 4 males, 5 females; 23 x 2006, 7 males, 8 females. Minkoameyos: 18 ii 2007, 6 males, 8 females; 31 iii 2007, 5 males, 8 females; 29 iv 2007, 1 male, 6 females; 24 vii 2006, 6 males, 12 females; 27 viii 2007, 8 males, 9 females; 26 ix 2007, 3 males, 4 females; 31 x 2007, 1 male, 3 females; 25 xi 2007, 3 males, 1 female, 3 larvae. Minwoho: 22 viii 2006, 4 males, 8 females, 13 larvae. Soa: 26 i 2006, 2 males, 8 females, 13 larvae; 18 ii 2006, 2 males, 3 females; 27 iii 2006, 2 males, 3 females, 1 larva; 28 iv 2006, 8 males, 12 females, 19 larvae; 24 v 2006, 2 males, 2 females; 27 vi 2006, 1 male, 4 females; 25 vii 2006, 5 males, 5 females; 30 viii 2006, 4 males, 7 females; 27 ix 2006, 9 males, 6 females; 21 x 2006, 8 males, 1 female; 29 xi 2006, 11 males, 9 females; 28 xii 2006, 2 males, 13 females; 24 i 2007, 5 males, 9 females; 18 ii 2007, 4 males, 8 females; 23 iv 2007, 13 males, 12 females; 31 v 2007, 13 males, 21 females, 1 larva; 26 vi 2007, 3 males, 8 females; 17 vii 2007, 1 male, 2 females, 1 larva; 25 viii 2007, 1 male, 2 females; 23 ix 2007, 2 males, 4 females; 25 x 2007, 2 males, 5 females, 1 larva; 28 xi 2007, 2 males, 4 females; 28 xii 2007, 4 males, 8 females.

Yangus sp. 3 (host plant: Albizia adianthifolia, Fabaceae): Di-libellingoï: 8 vii 2007, 1 male, 4 females, 1 larva. Ekekom: 16 ix 2006, 3 females. Minkoameyos: 27 viii 2007, 2 males, 3 females; 26 ix 2007, 2 males, 8 females, 3 larvae; 31 x 2007, 1 male, 2 females, 1 larva; 25 xi 2007, 4 males, 4 females. Soa: 23 iv 2006, 1 male, 9 females, 1 larva; 27 vi 2006, 1 male, 8 females, 3 larvae; 25 vii 2007, 4 males, 13 females; 30 viii 2007, 4 males, 11 females; 21 x 2006, 3 males, 6 females; 29 xi 2006, 2 males, 8 females, 4 larvae; 28 xii 2006, 3 males, 10 females, 1 larva; 24 i 2007, 4 females, 1 larva; 12 ii 2007, 1 male, 1 female; 24 iii 2007, 1 male, 3 females; 23 iv 2007, 1 male, 5 females; 31 v 2007, 9 males, 3 females, 2 larvae; 26 vi 2007, 6 males, 4 females, 1 larva; 17 vii 2007, 19 males, 20 females, 4 larvae; 23 ix 2007, 2 males, 2 females; 28 xi 2007, 4 males, 6 females, 1 larva; 28 xii 2007, 1 larva, 2 males, 4 females.

Yangus sp. 4 (host plant: Albizia zygia, Fabaceae): Di-libellingoï: 8 vii 2007, 2 males, 5 females. Ekekom: 16 ix 2006, 1 male, 1 female. Kala: 28 ix 2006, 1 male, 2 females; 19 x 2006, 2 females; 27 xi 2006, 2 males, 8 females; 27 xii 2006, 1 male, 1 female; 25 i 2007, 3 males, 1 female; 20 vii 2007, 1 male; 23 viii 2007, 3 males, 2 females; 22 ix 2007, 3 males, 2 females; 24 x 2007, 1 male, 4 females, 2 larvae; 17 xi 2007, 2 females, 2 larvae. Leboth: 12 x 2007, 1 male, 1 female. Minkoameyos: 26 i 2007, 1 male, 2 females; 27 viii 2007, 1 female; 31 x 2007, 2 males. Nkomilong: 29 i 2007, 1 male, 3 females. Soa: 30 viii 2006, 1 male, 4 females, 2 larvae; 27 ix 2006, 4 females, 2 larvae; 21 x 2006, 2 males, 4 females; 29 xi 2006, 1 male, 3 females; 28 xii 2006, 1 male, 5 females, 2 larvae; 24 i 2007, 12 males, 7 females; 12 ii 2007, 5 males, 4 females, 1 larva; 24 iii 2007, 2 males; 26 vi 2007, 2 males, 3 females; 17 vii 2007, 4 males, 16 females, 1 larva; 25 viii 2007, 4 males, 3 females; 23 ix 2007, 1 male, 1 female, 1 larva; 28 xi 2007, 1 male, 1 larva; 28 xii 2007, 7 males, 12 females, 5 larvae.

Subfamily Ciriacreminae Enderlein (1910)
Genus Ciriacremum Enderlein (1910)
Ciriacremum nigeriense Hollis, 1976 (host plant: Hylodendron gabunense, Fabaceae): Di-libellingoï: 8 vii 2007, 3 males, 1 female. Minkoameyos: 27 viii 2007, 4 males, 3 females; 26 ix 2007, 1 male, 9 females; 31 x 2007, 2 males, 2 females, 1 larva; 28 xi 2007, 4 females; 30 xii 2007, 1 male, 1 female. Nkomilong: 29 iii 2007, 1 male, 1 female, 4 larvae; 30 iv 2007, 2 males, 1 female, 1 larva; 26 v 2007, 5 males, 2 females, 24 larvae. Soa: 27 iii 2006, 3 males, 5 larvae.

Ciriacremum nigripes Hollis, 1976 (host plant unknown): Campus ENS (Yaounde): 12 iii 2007, 1 female.

Ciriacremum sp. 1 (host plant: Hymenostegia afzelii, Fabaceae): Di-libellingoï: 8 vii 2007, 2 males, 1 female. Kala: 24 ii 2006, 3 males, 3 females, 1 larva; 23 iii 2006, 7 males, 2 females, 1 larva; 27 iv 2006, 3 males, 2 females, 1 larva; 26 v 2006, 2 males, 1 female, 10 larvae; 28 vi 2006, 4 males, 4 females; 28 viii 2006, 2 males, 1 female, 7 larvae; 19 x 2006, 6 females, 1 larva; 27 xi 2006, 5 males, 7 females; 27 xii 2006, 7 males, 6 females; 25 I 2007, 5 males, 5 females; 16 ii 2007, 2 males, 2 females; 23 iii 2007, 6 males, 5 females, 8 larvae ; 27 iv 2007, 11 males, 6 females; 25 v 2007, 8 males, 5 females; 27 vi 2007, 1 male, 3 females; 20 vii 2007, 4 males, 1 female; 23 viii 2007, 1 female; 22 ix 2007, 2 males, 1 female; 24 x 2007, 1 male; 17 xi 2007, 4 females; 27 xii 2007, 4 males, 3 females. Nkomilong: 20 i 2006, 3 males, 3 larvae; 25 ii 2006, 3 males, 1 female, 2 larvae; 27 v 2006, 2 males, 2 females, 60 larvae; 29 vii 2006, 5 males, 4 females, 1 larva; 29 ix 2006, 3 males, 2 females, 14 larvae; 24 x 2006, 4 females, 35 larvae; 28 xi 2006, 7 males, 4 females, 5 larvae; 29 xii 2006, 2 males, 3 females; 29 i 2007, 10 males, 4 females, 2 larvae; 19 ii 2007, 6 males, 6 females, 3 larvae; 29 iii 2007,11 males, 11 females, 41 larvae; 30 iv 2007, 2 males, 3 females; 26 v 2007, 2 males, 1 female; 29 vi 2007, 2 females; 21 vii 2007, 3 males, 3 females, 3 larvae; 22 viii 2007, 1 male, 4 females; 29 ix 2007, 2 males; 27 x 2007, 1 male, 1 female; 24 xi 2007, 2 males, 4 females; 29 xii 2007, 2 males, 2 females, 9 larvae.

Ciriacremum sp. 2 (host plant: Plagiosiphon emarginatus, Fabaceae): Di-libellingoï: 8 vii 2007, 2 males, 1 female. Kala: 25 I 2007, 1 male, 1 female; 16 ii 2007, 2 males, 5 females; 23 iii 2007, 1 female; 27 xi 2007, 1 female; 27 xii 2007, 1 female. Nkomilong: 28 xi 2006, 1 male, 1 female; 29 xii 2006, 1 male, 1 female; 19 ii 2007, 4 males, 1 female; 29 vi 2007, 3 males, 1 female; 21 vii 2007, 1 male; 22 viii 2007, 11 males, 16 females, 5 larvae; 29 ix 2007, 2 males, 1 female; 27 x 2007, 7 males, 2 females; 24 xi 2007, 4 males, 1 female; 29 xii 2007, 7 males, 10 females; 29 xii 2007, 1 male.

Ciriacremum sp. 3 (host plant unknown): Nkomilong: 29 xii 2007, 1 male; 24 iii 2007, 1 female. Soa: 28 xii 2006, 1 female.

Ciriacremum sp. 4 (host plant: Hymenostegia afzelii, Fabaceae): Kala: 16 ii 2007, 1 female Nkomilong: 29 iii 2007, 20 males, 24 females, 60 larvae; 26 v 2007, 1 female; 24 xi 2007, 2 males; 29 xii 2007, 3 females.

Ciriacremum sp. 5 (host plant: Plagiosiphon longitubus, Fabaceae): Nkomilong: 22 viii 2007, 3 males, 3 females; 29 ix 2007, 2 males, 2 females; 27 x 2007, 14 males, 20 females, 25 larvae; 24 xi 2007, 20 males, 14 females, 9 larvae.

Genus Kleiniella Aulmann (1912)
Kleiniella sp. 1 (host plant: Hymenostegia brachyura, Fabaceae): Nkomilong: 23 iii 2006, 1 male; 29 iii 2007, 1 female; 21 vii 2007, 1 male; 22 viii 2007, 1 female; 27 x 2007, 1 male, 7 females, 4 larvae; 24 xi 2007, 1 male.

Kleiniella sp. 2 (host plant: Loesenera talbotii, Fabaceae): Di-libellingoï: 7 vii 2007, 1 male. Kala: 24 I 2006, 7 larvae; 24 ii 2006, 2 males, 2 females; 23 iii 2006, 3 male, 1 female; 27 iv 2006, 1 male, 1 female; 26 v 2006, 3 males, 2 females; 28 vi 2006, 20 larvae; 28 vii 2006, 3 males, 2 females; 19 x 2006, 1 female, 2 larvae; 27 xi 2006, 2 males, 4 females, 2 larvae; 27 xii 2006, 3 males; 25 i 2007, 11 males, 9 females, 18 larvae; 16 ii 2007, 5 males, 7 females; 23 iii 2007, 2 males, 4 females, 2 larvae; 27 iv 2007, 2 males, 3 females, 2 larvae; 25 v 2007, 2 males, 1 female; 27 vi 2007, 2 males; 20 vii 2007, 3 male; 22 ix 2007, 1 male; 17 xi 2007, 1 male, 1 female; 27 xii 2007, 1 male. Nkomilong: 25 ii 2006, 2 males, 2 females; 24 iii 2006, 2 males, 1 female; 29 iv 2006, 1 male, 1 female; 27 v 2006, 3 males, 2 females; 29 vi 2006, 1 female; 29 vii 2006, 3 females; 29 viii 2006, 1 male, 2 females; 29 ix 2006, 2 males, 5 larvae; 24 x 2006, 4 males, 5 females, 32 larvae; 28 xi 2006, 8 males, 4 females, 14 larvae; 29 xii 2006, 3 males, 2 females; 29 i 2007, 7 males, 7 females, 17 larvae; 19 ii 2007, 2 males, 3 females; 29 iii 2007, 3 males, 3 females; 30 iv 2007, 7 males, 4 females; 26 v 2007, 2 males; 29 vi 2007, 12 male, 16 female; 21 vii 2007, 1 female, 2 larvae; 1 male; 27 x 2007, 1 female; 24 xi 2007, 1 male; 29 xii 2007, 1 male, 2 females, 2 larvae.

Kleiniella sp. 3 (host plant: Zeukerella citrina, Fabaceae): Kala: 23 iii 2006, 3 females, 15 larvae; 27 xi 2006, 3 males, 3 females; 27 xii 2006, 2 males; 25 i 2007, 4 males, 1 female, 5 larvae; 16 ii 2007, 2 males, 5 females; 20 vii 2007, 1 female; 24 x 2007, 2 males, 1 female; 27 xii 2007, 6 males, 6 females. Nkomilong: 28 xi 2006, 1 male, 21 larvae; 29 xii 2006, 1 male; 30 iv 2007, 1 male.

Genus Heteropsylla Crawford (1914)
Heteropsylla cubana Crawford, 1914 (host plants: Leucaena sp., Fabaceae): Minkoameyos: 21 i 2006, 12 males, 10 females, 75 larvae; 22 ii 2006, 10 males, 17 females, 15 larvae; 29 iii 2006, 10 males, 17 females, 32 larvae; 1er v 2006, 17 males, 10 females, 14 larvae; 25 v 2006, 6 males, 7 females, 31 larvae; 26 vi 2006, 6 males, 11 females, 9 larvae; 30 vii 2006, 10 males, 15 females, 46 larvae; 27 viii 2006, 6 males, 6 females, 2 larvae; 30 ix 2006, 34 males, 31 females, 17 larvae; 26 x 2006, 6 males, 2 females, 1 larva; 26 xi 2006, 8 males, 9 females, 25 larvae; 26 xii 2006, 12 males, 17 females, 9 larvae; 26 i 2007, 19 males, 24 females, 16 larvae; 18 ii 2006, 7 males, 6 females, 16 larvae; 31 iii 2007, 26 males, 32 females, 10 larvae; 29 iv 2007, 25 males, 29 females, 24 larvae; 27 v 2007, 11 males, 13 females, 4 larvae; 28 vi 2007, 7 males, 24 females, 18 larvae; 24 vii 2007, 10 males, 16 females, 20 larvae; 27 viii 2007, 20 males, 14 females, 17 larvae; 26 ix 2007, 7 males, 6 females, 7 larvae; 31 x 2007, 5 males, 4 females, 4 larvae; 25 xi 2007, 4 males, 3 females, 9 larvae; 30 xii 2007, 7 males, 14 females, 1 larva. Minwoho: 23 viii 2006, 7 males, 5 females, 12 larvae.

Subfamily Diaphorininae Vondracek (1957)
Genus Diaphorina Löw (1879)
Diaphorina sp. (host plant: Vernonia amygdalina, Asteraceae): Ngoulmakong: 30 iv 2007, 29 males, 18 females, 153 larvae.

Genus Epipsylla Kuwayama (1908)
Epipsylla sp. 1 (host plant: Margaritaria discoidea, Euphorbiaceae): Kala: 18 iii 2006, 4 males, 3 females, 1 larva; 27 iv 2006, 1 male, 1 female; 28 vi 2006, 1 male, 1 female; 28 vii 2006, 2 males, 3 females; 28 ix 2006, 1 female; 27 xi 2006, 1 female; 16 ii 2007, 1 female; 23 iii 2007, 3 males, 3 females; 27 iv 2007, 2 males, 4 females; 25 v 2007, 2 males, 2 females; 27 vi 2007, 3 males, 4 females; 20 vii 2007, 3 males, 1 female; 23 viii 2007, 2 males, 3 females; 22 ix 2007, 1 male, 1 female; 24 x 2007, 2 females; 17 xi 2007, 1 male, 1 female, 1 larva; 27 xii 2007, 1 male, 1 female. Soa: 26 i 2006, 1 male, 2 females, 16 larvae; 18 ii 2006, 2 males, 2 females, 3 larvae; 28 iv 2006, 5 females; 27 vi 2006, 4 larvae; 25 vii 2006, 2 females, 1 larva; 30 viii 2006, 2 females; 27 ix 2006, 1 male, 3 females, 1 larva; 21 x 2006, 19 males, 14 females, 5 larvae; 28 xii 2006, 1 male, 2 females; 24 iii 2007, 1 male, 3 females, 17 larvae; 23 iv 2007, 13 males, 6 females; 31 v 2007, 3 males, 2 females; 26 vi 2007, 3 males, 1 female; 17 vii 2007, 2 males, 2 females.

Epipsylla sp. 2 (host plant: Baphiopsis sp., Fabaceae): Di-libellingoï: 8 vii 2007, 1 male. Kala: 27 xii 2006, 1 male, 1 female; 25 i 2007, 3 males, 3 females; 16 ii 2007, 1 male, 6 females, 16 larvae; 23 iii 2007, 2 males; 27 iv 2007, 3 males, 1 female; 25 v 2007, 1 male, 1 female; 27 vi 2007, 2 males; 20 vii 2007, 1 female; 23 viii 2007, 1 female; 22 ix 2007, 2 males, 1 larva; 24 x 2007, 1 female; 17 xi 2007, 1 female; 27 xii 2007, 3 males.

Epipsylla sp. 3 (host plant unknown): Kala: 24 iii 2006, 1 female.

Subfamily Euphalerinae Becker-Migdisova (1973)
Genus Colophorina Capener (1973)
Colophorina sp. 1 (host plant: Baphiopsis parvifolia, Fabaceae): Kala: 16 ii 2007, 4 males, 5 females, 3 larvae; 19 x 2006, 1 male, 1 female; 20 vii 2007, 3 males, 5 females, 1 larva; 22 ix 2007, 1 female; 23 ii 2006, 2 males, 3 females, 5 larvae; 23 iii 2006, 5 males, 6 females, 5 larvae; 23 iii 2007, 5 males, 2 females; 23 viii 2007, 1 male, 1 female; 25 i 2007, 7 males, 7 females, 18 larvae; 25 v 2007, 5 males, 3 females; 27 iv 2006, 1 male, 2 females, 1 larva; 27 iv 2007, 9 males, 15 females, 15 larvae; 27 vi 2007, 3 males, 7 females, 2 larvae; 27 xi 2006, 7 females, 5 larvae; 27 xii 2006, 2 males, 5 females, 12 larvae; 28 ix 2006, 2 females, 6 larvae; 28 vi 2006, 4 males, 5 females, 2 larvae. Nkomilong: 19 ii 2007, 2 males, 3 females, 15 larvae; 24 iii 2006, 3 males, 4 females; 24 xi 2007, 1 male; 25 ii 2006, 3 males, 3 females, 6 larvae; 26 v 2006, 2 males, 12 females, 4 larvae; 29 i 2007, 10 males, 10 females, 7 larvae; 29 ix 2006, 1 male, 4 larvae; 29 vii 2006, 2 males, 3 females, 1 larva; 29 xii 2007, 1 male, 2 females, 1 larva. Soa: 12 ii 2007, 2 males, 9 females, 14 larvae.

Colophorina sp. 2 (host plant unknown): Kala: 16 ii 2007, 1 male, 2 larvae.

Genus cf. Euryconus Aulmann (1912)
Euryconus sp. (host plant: Dialium sp., Fabaceae): Kala: 27 iv 2006, 8 males, 14 females; 26 v 2006, 1 male, 1 female, 2 larvae; 28 vi 2006, 2 males, 10 females; 28 vii 2006, 19 males, 38 females, 15 larvae; 28 viii 2006, 15 males, 25 females; 28 ix 2006, 7 males, 9 females; 19 x 2006, 4 males, 4 females, 1 larva; 27 xi 2006, 3 males, 2 females, 12 larvae; 27 xii 2006, 6 males, 4 females, 2 larvae; 25 i 2007, 9 males, 13 females; 16 ii 2007, 8 males, 9 females, 2 larvae; 23 iii 2007, 10 males, 7 females; 27 iv 2007, 2 males, 6 females; 25 v 2007, 3 males, 2 females; 27 vi 2007, 1 female. Nkomilong: 22 iii 2006, 6 females, 5 larvae; 27 v 2006, 1 fmale; 29 xii 2006, 8 males, 9 females; 29 i 2007, 24 males, 21 females, 1 larva; 19 ii 2007, 9 males, 10 females; 29 iii 2007, 2 males, 1 female, 1 larva; 30 iv 2007, 5 males, 2 females; 26 v 2007, 1 male, 1 female; 29 vi 2007, 4 males; 21 vii 2007, 2 males; 22 viii 2007, 3 males, 4 females; 29 ix 2007, 1 male, 1 female; 27 x 2007, 2 males, 1 female; 24 xi 2007, 1 male; 29 xii 2007, 2 males, 1 female.

Gen. sp. 1 (host plant: Millettia laurentii, Fabaceae): Di-libellingoï: 8 vii 2007, 6 males, 10 larvae. Kala: 22 iii 2006, 3 males, 8 females, 1 larva; 27 iv 2006, 2 females; 19 x 2006, 1 male, 8 females, 12 larvae; 25 I 2007, 9 females, 2 larvae; 16 ii 2007, 2 males, 6 females, 31 larvae; 27 iv 2007, 9 males, 1 female, 9 larvae; 25 v 2007, 9 males, 6 females, 75 larvae; 27 vi 2007, 3 males, 4 females; 20 vii 2007, 3 females. Minkoameyos: 27 viii 2007, 1 male, 1 female, 3 larvae. Minwoho: 28 viii 2006, 2 males, 7 females, 1 larva. Nkomilong: 19 ii 2007, 9 males, 5 females, 13 larvae; 29 iii 2007, 4 males, 5 females, 4 larvae; 30 iv 2007, 1 male, 2 females, 30 larvae; 21 vii 2007, 4 males, 4 females ; 22 viii 2007, 1 male, 1 larva. Soa: 26 i 2006, 9 males, 6 female, 33 larvae; 18 ii 2006, 6 males, 3 females, 32 larvae; 27 iii 2006, 2 males, 10 females; 28 iv 2006, 14 males, 10 females, 127 larvae; 24 v 2006, 6 males, 6 females, 11 larvae; 27 vi 2006, 2 males, 2 females, 7 larvae; 25 vii 2006, 5 males, 2 females, 13 larvae; 30 viii 2006, 9 males, 4 females, 12 larvae; 27 ix 2006, 10 males, 12 females, 1 larva; 21 x 2006, 8 males, 5 females, 25 larvae; 29 xi 2006, 2 males, 2 females, 32 larvae; 28 xii 2006, 5 males, 10 females, 15 larvae; 24 i 2007, 3 males, 1 female; 12 ii 2007, 15 males, 14 females, 2 larvae; 24 iii 2007, 9 males, 2 females; 29 iv 2007, 9 males, 5 females, 21 larvae; 31 v 2007, 11 males, 12 females, 6 larvae; 26 vi 2007, 2 males, 2 females; 17 vii 2007, 3 males, 7 females, 7 larvae; 25 viii 2007, 3 males, 3 females, 16 larvae; 25 x 2007, 4 males, 1 larva; 28 xi 2007, 2 males, 9 larvae; 28 xii 2007, 4 males, 2 females, 7 larvae.

Gen. sp. 2 (host plant: Detarium macrocarpum, Fabaceae): Kala: 27 xii 2006, 2 males, 2 females; 25 i 2007, 2 males, 1 female; 16 ii 2007, 6 males, 4 females, 6 larvae; 23 iii 2007, 5 males, 1 female; 27 iv 2007, 5 males, 5 females; 25 v 2007, 5 males; 20 vii 2007, 2 males, 4 females; 23 viii 2007, 4 males, 1 female, 1 larva; 22 ix 2007, 5 males, 2 females; 24 x 2007, 1 male; 17 xi 2007, 1 female; 27 xii 2007, 1 female. Soa: 28 iv 2006, 1 female; 12 ii 2007, 1 male, 1 larva; 23 iv 2007, 3 males, 1 female; 17 vii 2007, 1 female.

Gen. sp. 3 (host plant: Millettia sp., Fabaceae): Eloumden: 21 ii 2006, 3 males, 5 females, 8 larvae. Kala: 27 iv 2007, 1 male. Nkomilong: 27 v 2006, 2 males, 3 females, 2 larvae; 29 i 2007, 1 male, 1 female, 9 larvae; 19 ii 2007, 2 males, 3 females; 29 iii 2007, 2 males, 1 female; 30 iv 2007, 4 males, 2 females; 26 v 2007, 1 female; 29 vi 2007, 1 female; 22 viii 2007, 1 female; 29 xii 2007, 1 male, 1 larva.

Gen. sp. 4 (host plant: Jollydora duparquetiana, Connaraceae): Kala: 27 xi 2006, 1 male, 2 larvae.

Gen. sp. 5 (host plant unknown): Kala: 27 iv 2006, 5 males, 9 females, 24 larvae.

Subfamily Paurocephalinae Vondracek (1963)
Genus Diclidophlebia Crawford (1920)
Diclidophlebia eastopi Vondráèek, 1963 (host plant: Triplochiton scleroxylon, Sterculiaceae): Eloumden: 21 ii 2006, 6 males, 2 females; Feme-Nord: 14 vii 2007, 1 male, 4 females. Kala: 16 ii 2006, 1 male, 2 females, 9 larvae; 22 iii 2006, 1 male, 1 female, 4 larvae; 27 iv 2006, 1 male, 2 females, 4 larvae; 26 v 2006, 2 males, 2 males, 1 larva; 28 viii 2006, 2 males, 5 females; 28 ix 2006, 2 females; 19 x 2006, 2 females; 27 xi 2006, 2 males, 3 females, 3 larvae; 27 xii 2006, 1 male, 5 females, 9 larvae; 25 i 2007, 3 males, 3 females, 1 larva; 23 iii 2007, 2 males, 3 females, 2 larvae; 27 iv 2007, 2 m ales, 6 females; 25 v 2007, 1 male; 27 vi 2007, 1 male, 2 females; 20 vii 2007, 2 females, 1 larva; 23 viii 2007, 2 males, 2 females; 24 x 2007, 1 female, 10 larvae; 17 xi 2007, 1 female. Leboth: 23 x 2006, 3 males, 1 female. Minkoameyos: 31 iii 2007, 2 males, 1 female, 1 larva; 28 vi 2007, 2 males, 5 females; 24 vii 2007, 1 male, 4 females; 27 viii 2007, 2 males, 5 females; 26 ix 2007, 1 female. Nkol-Ekotsing: 18 vii 2006, 6 males, 20 females, 1 larva. Nkomilong: 29 xii 2007, 1 male, 1 female.

Diclidophlebia harrisoni Osisanya, 1969 (host plant: Triplochiton scleroxylon, Sterculiaceae): Kala: 22 iii 2006, 1 female; 27 iv 2006, 1 male, 1 female; 25 i 2007, 2 males, 4 females; 16 ii 2007, 1 female; 23 iii 2007, 4 males. Minkoameyos: 28 vi 2007, 1 male. Nkol-Ekotsing: 18 vii 2006, 1 male, 3 females.

Diclidophlebia irvingiae Burckhardt et al. 2006 (host plants: Desbordesia glaucescens, Irvingia gabonensis, Simaroubaceae): Nkomilong: 29 xii 2006, 1 male.

Diclidophlebia leptonychiae Burckhardt et al. 2006 (host plants: Leptonychia macrantha, perhaps also Nesogordonia papaverifera, Sterculiaceae): Kala: 23 iii 2007, 1 male; 27 iv 2007, 2 males, 3 females, 1 larva; 27 vi 2007, 1 female; 20 vii 2007, 3 males, 2 females. Minkoameyos: 18 ii 2007, 6 males, 4 females; 31 iii 2007, 2 males, 1 female.

Diclidophlebia xuani Messi, 1998 (host plant: Ricinodendron heudelotii, Euphorbiaceae): Di-libellingoï: 7 vii 2007, 5 males, 6 females, 3 larvae. Eloumden: 21 ii 2006, 3 males, 4 females, 1 larva. Kala: 24 i 2006, 3 males, 4 females, 4 larvae; 22 iii 2006, 5 males, 5 females, 9 larvae; 27 iv 2006, 6 males, 6 females, 9 larvae; 28 viii 2006, 1 male, 5 females; 27 xi 2006, 10 males, 5 females, 4 larvae; 27 xii 2006, 2 males, 3 females, 4 larvae; 25 i 2007, 5 males, 2 females; 16 ii 2007, 15 males, 12 females, 6 larvae; 23 iii 2007, 14 males, 13 females, 27 larvae; 27 iv 2007, 1 male,4 females; 25 v 2007, 1 male; 27 vi 2007, 3 males, 6 larvae; 20 vii 2007, 3 males, 4 females, 4 larvae;, 22 ix 2007, 2 females. Leboth: 23 x 2006, 3 males, 1 female, 8 larvae. Minkoameyos: 29 iii 2006, 5 males, 5 females; 1 v 2006, 6 males, 2 females, 8 larvae; 25 v 2006, 7 males, 5 females,8 larvae; 26 vi 2006, 11 males, 10 females, 7 larve; 30 vii 2006, 1 male, 2 females; 27 viii 2006, 2 males, 8 females, 10 larvae. Minwoho: 22 viii 2006, 10 males, 9 females, 26 larvae. Nkol-Ekotsing: 18 vii 2006, 1 male, 2 females. Nkomilong: 29 iii 2007, 2 males, 4 larvae; 26 v 2007, 4 males, 1 female; 29 vi 2007, 2 females. Soa: 28 iv 2006, 8 males, 10 females, 7 larvae; 24 v 2006, 2 males, 3 females; 27 ix 2006, 3 males, 4 females, 3 larvae; 21 x 2006, 2 males, 4 females; 17 vii 2007, 6 males, 4 females, 3 larvae; 25 viii 2007, 1 male, 1 female; 23 ix 2007, 1 male, 1 female; 25 x 2007, 1 male, 2 females; 28 xi 2007, 1 male.

Diclidophlebia sp. 1 (host plant unknown): Bialanguena: 18 viii 2007, 3 males, 1 female. Di-libellingoï: 7 vii 2007, 1 male, 2 females. Soa: 17 vii 2007, 4 males, 2 females; 25 viii 2007, 1 male; 23 ix 2007, 2 males; 25 x 2007, 1 female; 28 xi 2007, 1 male; 28 xii 2007, 1 male.

Genus Paurocephala Crawford (1914)

Paurocephala sp. 1 (host plant: Agelaea hirsuta, Connaraceae): Kala: 27 iv 2006, 3 males; 28 vii 2006, 5 males, 6 females, 5 larvae; 28 viii 2006, 3 males, 3 females, 33 larvae; 27 xi 2006, 2 males, 5 females; 27 xii 2006, 10 males, 8 females; 27 iv 2007, 10 males, 5 females, 8 larvae; 25 v 2007, 9 males, 3 females, 10 larvae; 20 vii 2007, 5 males, 5 females, 1 larva; 23 viii 2007, 1 female; 22 ix 2007, 1 female, 10 larvae; 24 x 2007, 9 males, 12 females, 9 larvae; 17 xi 2007, 4 males, 3 females, 2 larvae; 27 xii 2007, 2 males, 1 female, Nkomilong: 23 i 2006, 3 males, 5 females; 25 ii 2006, 3 males, 5 females, 93 larvae; 24 iii 2006, 7 males, 3 females, 1 larva; 27 v 2006, 17 males, 6 females, 3 larvae; 29 vi 2006, 4 males, 3 females, 8 larvae; 29 ix 2006, 7 males, 14 females, 13 larvae; 24 x 2006, 3 males, 6 females, 1 larva; 28 xi 2006, 5 males, 6 females; 29 xii 2006, 3 males, 1 female, 1 larva; 29 i 2007, 7 males,7 females; 19 ii 2007, 5 males, 7 females; 29 iii 2007, 3 males, 1 female; 30 iv 2007, 2 males, 1 female, 20 larvae; 26 v 2007, 2 males, 2 females; 29 vi 2007, 3 males, 2 females, 2 larvae; 22 viii 2007, 8 males, 5 females, 6 larvae; 29 ix 2007, 3 males, 2 females; 27 x 2007, 1 male, 4 females; 24 xi 2007, 1 male; 29 xii 2007, 1 male.

Paurocephala sp. 2 (host plant: Cnestis ferruginea, Connaraceae): Di-libellingoï: 8 vii 2007, 3 males, 5 females, 43 larvae. Ekekom: 16 ix 2006, 4 females, 4 larvae. Feme-Nord: 14 vii

2007, 6 males, 14 females, 2 larvae. Kala: 28 vii 2006, 16 males, 20 females, 2 larvae; 27 iv 2007, 2 males, 4 females. Leboth (Okola): 23 x 2006, 11 males, 19 females, 55 larvae; 12 x 2007, 4 males, 2 females, 1 larva. Minkoameyos: 18 ii 2007, 7 males, 9 females, 19 larvae; 31 iii 2007, 2 males, 5 females; 29 iv 2007, 14 males, 8 females, 20 larvae; 24 vii 2007, 5 males; 27 viii 2007, 1 female. Minwoho (Evodoula): 22 viii 2006, 5 males, 4 females, 5 larvae. Soa: 26 i 2006, 15 males, 5 females, 57 larvae; 18 ii 2006, 2 males, 3 females, 2 larvae; 27 iii 2006, 17 males, 9 females, 6 larvae; 28 iv 2006, 5 males, 1 female; 25 v 2006, 1 male, 1 female, 1 larva; 27 vi 2006, 3 males, 7 females, 1 larva; 25 vii 2006, 1 male; 30 viii 2006, 6 males, 10 females; 27 ix 2006, 5 males, 8 females, 11 larvae; 21 x 2006, 3 males, 3 females, 16 larvae; 29 xi 2006, 8 males, 15 females, 68 larvae; 28 xii 2006, 3 males, 3 females; 24 i 2007, 10 males, 15 females, 8 larvae; 12 ii 2007, 10 males, 5 females, 2 larvae; 24 iii 2007, 8 males, 11 females; 23 iv 2007, 13 males, 15 females; 31 v 2007, 3 males, 7 females, 3 larvae; 26 vi 2007, 7 males; 17 vii 2007, 8 males, 7 females; 25 viii 2007, 8 males, 4 females, 1 larva; 23 ix 2007, 3 males, 6 females, 4 larvae; 25 x 2007, 4 males, 5 females, 6 larvae; 28 xi 2007, 8 males, 11 females; 28 xii 2007, 3 males, 5 females, 2 larvae.

Genus Syntomoza Enderlein (1921)
Syntomoza sp. 1 (host plant: Homalium letestii, Flacourtiaceae): Kala: 24 i 2006, 2 males, 1 female, 4 larvae; 24 ii 2006, 33 larvae; 28 vi 2006, 1 female, 1 larva; 16 ii 2007, 7 males, 14 females, 55 larvae; 23 iii 2007, 1 male, 3 females, 9 larvae. Nkomilong: 27 v 2006, 4 females, 8 larvae; 29 viii 2006, 9 males, 6 females, 35 larvae; 29 ix 2006, 2 males, 1 female, 1 larva.

Subfamily Psyllinae Löw/Arytaininae Crawford (1879)
Genus Cacopsylla Ossiannilsson (1970)
Cacopsylla sp. (host plant unknown): Nkomilong: 28 xi 2006, 2 females.

Genus Palaeolindbergiella Heslop-Harrison (1961)
Palaeolindbergiella sp. 1 (host plant: Dalbergia sp., Fabaceae): Ekekom (Obala): 16 ix 2006, 15 males, 14 females, 32 larvae. Kala: 20 vii 2007, 1 male, 1 female. Minkoameyos: 27 viii 2007, 4 males, 2 females; 25 xi 2007, 3 males; 30 xii 2007, 1 male. Nkomilong: 20 i 2006, 32 larvae; 25 ii 2006, 9 males, 6 females; 24 iii 2006, 3 males, 1 female, 6 larvae; 29 iv 2006, 2 males, 4 females; 27 v 2006, 11 males, 4 females, 8 larvae; 29 vi 2006, 7 males, 3 females, 1 larva; 29 vii 2006, 7 males, 7 females, 2 larvae; 29 viii 2006, 3 males, 2 females, 3 larvae; 29 ix 2006, 1 female; 24 x 2006, 2 males, 2 females; 28 xi 2006, 7 males, 5 females, 1 larva; 29 i 2007, 12 males, 13 females, 11 larvae; 19 ii 2007, 2 males, 2 females; 29 iii 2007, 2 males, 3 females, 1 larva; 30 iv 2007, 3 males, 2 females; 26 v 2007, 1 female; 29 vi 2007, 3 males, 3 females; 21 vii 2007, 6 males, 9 larvae; 22 viii 2007, 1 male, 1 female, 4 larvae; 29 ix 2007, 1 male, 1 female; 27 x 2007, 1 female, 3 larvae; 24 xi 2007, 3 larvae; 29 xii 2007, 1 male, 1 female; 29 xii 2006, 12 males, 8 females. Soa: 26 vi 2007, 1 male, 1 female, 7 larvae.

Palaeolindbergiella sp. 2 (host plant: Dalbergia sp., Fabaceae): Kala: 27 xii 2006, 1 female. Nkomilong: 25 ii 2006, 1 male, 1 female, 7 larvae; 24 iii 2006, 2 larvae; 29 iv 2006, 2 males, 11 larvae; 29 vi 2006, 2 males, 1 female, 4 larvae; 29 vii 2006, 5 males, 5 females, 4 larvae; 29 viii 2006, 4 males, 3 females, 3 larvae; 29 ix 2006, 1 male, 1 male, 2 larvae; 24 x 2006, 7 larvae; 28 xi 2006, 5 males, 4 females, 7 larvae; 29 xii 2006, 5 males, 3 females, 6 larvae; 29 i 2007, 2 males, 1 female, 2 larvae; 30 iv 2007, 4 males, 1 female; 26 v 2007, 5 males, 1 female; 29 vi 2007, 3 females, 5 larvae; 21 vii 2007, 2 males, 4 females, 6 larvae; 22 viii 2007, 3 males, 3 females; 29 ix 2007, 1 male, 1 female; 27 x 2007, 1 male, 4 females, 2 larvae; 24 xi 2007, 2 males, 1 female; 29 xii 2007, 3 males, 2 females, 1 larva. Soa: 24 v 2006, 3 males, 27 larvae; 25 vii 2006, 1 female.

Psylla sp. cf. winkleri Rübsaamen (host plant unknown): Minkoameyos: 27 viii 2007, 1 female.

Gen. sp. 1 (host plant: Anthonotha macrophylla, Fabaceae): Ekekom (Obala): 16 ix 2006, 6 males, 4 females, 24 larvae. Kala: 23 ii 2006, 1 male, 3 females, 11 larvae; 16 ii 2007, 2 females; 23 iii 2007, 3 males, 2 females, 7 larvae; 27 iv 2007, 3 males, 4 females; 25 v 2007, 1 male; 27 vi 2007, 1 male; 20 vii 2007, 6 males, 8 females, 2 larvae; 23 viii 2007, 1 female; 17 xi 2007, 1 male, 1 female; 27 xii 2007, 1 female. Nkomilong: 20 i 2006, 3 males, 2 females, 27 larvae; 29 iv 2006, 9 males, 3 females, 4 larvae; 27 v 2006, 1male, 1 female, 1 larva; 29 vii 2006, 1 male, 1 female; 29 viii 2006, 7 males, 5 females, 15 larvae; 29 ix 2006, 3 males, 2 females, 3 larvae; 29 i 2007, 1 male, 1 female, 1 larva; 19 ii 2007, 3 males, 9 larvae; 30 iv 2007, 4 males, 3 females, 2 larvae; 26 v 2007, 1 male, 2 females; 29 vi 2007, 1 male, 1 female, 21 larvae; 21 vii 2007, 1 male; 22 viii 2007, 3 males, 2 females.

Gen. sp. 2 (host plant: Prunus africana, Rosaceae): Minkoameyos: 21 i 2006, 1 male, 5 females; 22 ii 2006, 1 male, 4 females, 1 larva; 29 iii 2006, 3 males, 12 females, 10 larvae; 1 v 2006, 5 males, 11 females; 25 v 2006, 1 male, 7 females, 9 larvae; 26 vi 2006, 1 male, 4 females; 30 vii 2006, 2 males, 15 females, 9 larvae; 27 viii 2006, 2 females, 3 larvae; 30 ix 2006, 2 males, 8 larvae; 26 x 2006, 2 males, 2 females, 2 larvae; 26 xi 2006, 7 males, 7 females, 14 larvae; 26 xii 2006, 5 males, 8 females, 2 larvae; 21 i 2007, 5 males, 10 females, 3 larvae; 18 ii 2007, 1 male; 24 vii 2007, 1 female; 27 viii 2007, 2 males, 3 females, 1 larva; 26 ix 2007, 1 female; 31 x 2007, 1 male, 7 females; 25 xi 2007, 3 males, 3 females, 2 larvae; 30 xii 2007, 10 males, 17 females, 9 larvae.

Gen. sp. 3 (Albizia glaberrima, Fabaceae): Minkoameyos: 18 ii 2007, 1 female. Soa: 31 v 2007, 1 female; 25 viii 2007, 1 male, 1 female; 23 ix 2007, 1 male; 25 x 2007, 1 male; 28 xi 2007, 1 male, 2 females; 28 xii 2007, 1 male, 2 females.

Gen. sp. 4 (host plant: Dalbergia sp., Fabaceae): Minkoameyos: 25 xi 2007, 3 males, 5 females; 30 xii 2007, 26 males, 11 females, 4 larvae.

Subfamily Spondyliaspidinae, Heslop-Harrison (1954)
Genus Blastopsylla Taylor (1985)
Blastopsylla occidentalis Taylor (host plant: Eucalyptus sp., Myrtaceae): Kala: 25 i 2007, 1 female. Warda (Yaounde): 1 ix 2007, 30 males, 15 females, 24 larvae; 28 xii 2007, 14 males, 19 females.

DISCUSSION

Faunistics
In the Center Region of Cameroon 45 species of Psyllidae were recorded during a survey from January 2006 to December 2007. They belong to the following 7 subfamilies: Aphalaroidinae (1 genus, 4 species), Ciriacreminae (3 genera, 11 species), Diaphorininae (2 genera, 4 species), Euphalerinae (7 genera, 8 species), Paurocephalinae (3 genera, 9 species), Psyllinae/Arytaininae (7 genera, 8 species) and Spondyliaspidinae (1 genus, 1 species). Tamesse (2005) listed 26 species of Psyllidae from the entire territory of Cameroon known up to 2005. Among the 45 species collected during the present survey, 36 remain unnamed and 27 are reported for the first time from the Center Region.

Two species are exotic which recently have been introduced into Cameroon: Blastopsylla occidentalis associated with eucalypts and Heteropsylla cubana which develops on Leucaena sp. Both are pests on their hosts and have been reported also from elsewhere in Africa.

Eleven species were common being collected at least thirty times: Kleiniella sp. 2 (45 times), Ciriacremum sp. 1 (42 times), Euphalerinae gen. sp. 1 (40 times), Diclidophlebia xuani (37 times), Paurocephala sp. 2 (35 times), Yangus sp. 2 (34 times), Paurocephala sp. 1 (33 times), Epipsylla sp. 1 (31 times), Yangus sp. 4 (31 times), Colophorina sp. 1 (30 times) and Palaeolindbergiella sp. 1 (30 times). Nine species were collected only once: Ciriacremum nigripes, Colophorina sp. 2, Psylla cf. winkleri, Epipsylla sp. 3, Diclidophlebia irvingiae, Diaphorina sp. 1, Euphalerinae gen. sp. 4 and Euphalerinae gen. sp. 5.

Phenology
From January 2006 to December 2007, Palaeolinbergiella sp. 1 was collected 24 times at Nkomilong (Fig. 1). Most of the time all developmental stages were observed on its host plant, Dalbergia sp. The highest number of individuals was noted from January to February 2006. The host plant phenology explains this proliferation because after the rainy season, this plant renews its leaves.

From January 2006 to December 2007, Paurocephala sp. 2 was collected 24 times at Soa (Fig. 2). Most of the time all development stages were observed on its host plant, Cnestis ferruginae. The highest number of individuals was noted from October to December 2006. The host plant phenology explains this proliferation because during the rainy season the host renews their leaves.

From January 2006 to December 2007, Euryconus sp. 1 was collected 15 times at Kala (Fig. 3) and 15 times at Nkomilong (Fig. 4). Most of the time all developmental stages were observed on its host at Kala but at Nkomilong the larvae were collected only in March. The highest number of individuals was noted from June to September 2006 at Kala and from December 2006 to March 2007 at Nkomilong. The two localities have the same climatic conditions, suggesting that the difference of proliferation in the two localities is due to the phenology of plants.

From January 2006 to December 2007, Ciriacremum sp. 1 was collected 21 times at Kala (Fig. 5) and 20 times at Nkomilong (Fig. 6). Most of the time all developmental stages were observed on the host in both localities. The highest number of individuals was noted during the rainy seasons and showed the same periods of proliferation in the two localities. At Nkomilong larval stages predominated, compared with adults.


Image for - Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants
Fig. 1: Numbers of larvae, males and females of Palaeolindbergiella sp. 1 collected at Nkomilong on Dalbergia sp.

Image for - Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants
Fig. 2: Numbers of larvae, males and females of Paurocephala sp. 2 collected at Soa on Cnectis ferruginae

Image for - Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants
Fig. 3: Numbers of larvae, males and females of Euryconus sp. 1 collected at Kala on Dialium sp.

Image for - Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants
Fig. 4: Numbers of larvae, males and females of Euryconus sp. 1 collected at Nkomilong on Dialium sp.

Image for - Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants
Fig. 5: Numbers of larvae, males and females of Ciriacremum sp. 1 collected at Kala on Hymenostegia afzelii

Image for - Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants
Fig. 6: Numbers of larvae, males and females of Ciriacremum sp. 1 collected at Nkomilong on Hymenostegia afzelii

From January 2006 to December 2007, Kleiniella sp. 2 was collected 20 times at Kala (Fig. 7) and 21 times at Nkomilong (Fig. 8). Most of time all developmental stages were present on the host in both localities. At Kala two peaks of proliferation were observed at May 2006 and January 2007, respectively; At Nkomilong three peaks of proliferation were observed, i.e., in October 2006, January and June 2007. As the two localities are ruled by the same climatic conditions, difference of proliferation period my be the result of differences in the host phenology.

Host Plants
Host plants are known for 37 of the 45 species reported from the Center Region (Table 2). The host record of Euphalerinae genus sp. 4 (Connaraceae: Jollydora) is questionable as members of the Euphalerinae are generally associated with Fabaceae. Most of the species discussed here are monophagous on their respective hosts.


Image for - Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants
Fig. 7: Numbers of larvae, males and females of Kleiniella sp. 2 collected at Kala on Loesenera talbotii

Image for - Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants
Fig. 8: Numbers of larvae, males and females of Kleiniella sp. 2 collected at Nkomilong on Loesenera talbotii

Exceptions are Diclidophlebia irvingia which is associated with Desbordesia and Irvingia, as well as Blastopsylla occidentalis and Heteropsylla cubana which are narrowly oligophagous on Eucalyptus sp. and Leucaena sp., respectively. Incidently the last two species are widely distributed, exotic pests.

The Fabaceae includes 12 species of host plants; their psyllids belong to the genera Ciriacremum, Kleiniella, Epipsylla, Euryconus, one unknown genus sp. 2 of Euphalerinae and one unknown genus sp. 1 of Psyllinae/Arytaininae subfamily. Within this family, Hymenostegia afzelii hosted two different species of Ciriacremum genus. The family of Mimosaceae includes five species of host plants, of which four belong to the Albizia genus; their psyllids belong to the following genera: Yangus, Heteropsylla and gen. sp. 3 (Psyllinae/Arytaininae). Albizia glaberrima hosted two different species of psyllids: Yangus sp. 2 and one unknown genus, sp. 3 of Psyllinae/Arytaininae subfamily. The family of


Table 2: List of Host families and genera with associated psyllid species from the center region of Cameroon
Image for - Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants

Fabaceae includes three species; their psyllids belong to the following genera: Palaeolinbergiella, one unknown genus sp. 4 of Psyllinae/Arytaininae subfamily, two unknown genera sp. 1 and sp. 3 of Euphalerinae subfamily; within this family, Dalbergia genus hosted three different species of psyllids. The family of Connaraceae includes three species; their psyllids belong to the Paurocephala genus and one unknown genus sp. 4 of Euphalerinae subfamily. The family of Euphorbiaceae includes two species; their psyllids belong to the Epipsylla and Diclidophlebia genera. The other families are represented by only one species: Asteraceae, its psyllid belongs to the Diaphorina genus; Sterculiaceae, Irvingiaceae and Leptonychiaceae, their psyllids belong to the Diclidophlebia genus; Diclidophlebia eastopi and D. harrisoni were collected on the same Sterculiaceae (Triplochiton scleroxylon); Flacourtiaceae, its psyllid belongs to the Syntomoza genus; Rosaceae, its psyllid belongs to a non described genus (gen.2) of Psyllinae/Arytaininae subfamily and Myrtaceae, its psyllid belongs to the Blastopsylla genus. The host plants of 6 species of psyllids remain unknown.

During higher proliferation, adults and larvae of H. cubana invaded the whole surface of buds and young leaves (Fig. 9a). The larvae of Epipsylla sp. feeding on M. discoidae provoked the appearance of galls on the leaves (Fig. 9b). Damage caused by Syntomoza sp. on H. letestii (Fig. 9c) and D. xuani on R. heudelotii are similar to those observed on H. letestii (Fig. 9d). The damage consists of distortion and deformation of leaves as well as leaf rolling. Kleiniella sp. 2 was associated with Loesenera talbotii caused discolouration on its host plant and provoked leaf necrosis. Species such as Ciriacremum sp. 1 on H. afzelii (Fig. 9e) and D. leptonychiae on L. macrantha (Fig. 9f) secreted a white waxy filament on their host plants.

Tamesse (2005) recognised, in various regions of Cameroon, among Psyllidae family, 8 subfamilies, 14 genera and 26 species. In the western region of Cameroon, Dzokou et al. (2009) investigated 7 subfamilies, 22 genera and 37 species. During the present survey, we recorded within the same family, 45 species belonging to 24 genera and 7 subfamilies.


Image for - Jumping Plant-Lice of the Family Psyllidae Latreille (Hemiptera: Psylloidea) from the Center Region of Cameroon: Faunistics, Phenology and Host Plants
Fig. 9: Psyllids damages on host plants, (a) higher proliferation of adults and larvae of Heteropsylla cubana invaded on leaves and buds of Leucaena glauca Fabaceae, (b) galls induced by larvae of Epipsylla sp. 1 on leaves of Margaritaria discoidea Euphorbiaceae, (c) distortion and deformation induced by Syntomoza sp. on leaves of Homalium letestii Flacourtiaceae, (d) distortion and deformation induced by Diclidophlebia xuani on leaves of Ricinodendron heudelotii Euphorbiaceae, (e) white waxy flocculence produced by Ciriacremum sp. 1 on Hymenostegia afzelii Fabacaea and (f) white waxy flocculence produced by Diclidophlebia leptonychiae on Leptonychiae macrantha Sterculiaceae

Nine genera and 36 species are undescribed. Among the 45 species, 27 species are reported in the center region of Cameroon for the first time; also, 5 new genera are recorded in Euphalerinae subfamily and 4 new genera in Psyllinae subfamily. The Psyllidae family is more diverse in Cameroon in contrast of Triozidae family where, according to Tamesse et al. (2007), included 2 genus and 35 species. Also, the Phacopteronidae family, less diverse than the Psyllidae family, included in Cameroon 9 psyllids species (Malenovsky et al., 2007).

ACKNOWLEDGMENTS

We thank Prof. B. Sonke (University of Yaoundé I) and Dr Tadjoute (National Herbarium Yaounde) for the identification of plants. This work was partly funded by the Swiss National Science Foundation (Research Partnership with Developing Countries, Project No. 3170A0-109221/1, to DB and JLT).

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20:  Messi, J. and M. Nguefang, 1993. Mesohomotoma hollisi, new species of psyllid feed on Scaphopetalum blackii Mast (Homoptera, Psylloidea). Bull. Soc. Entomol. Fr., 98: 127-130.

21:  Tamesse, J.L., 2005. Contribution to the study of the biodiversity, taxonomy and biology of psyllids (Hemiptera: Psylloidea) in Cameroun. Doctorat d'Etat Thesis, Univerity Yaounde I, Cameroon, pp: 285.

22:  Lebel, T.J., B. Daniel, D.V. Joly, Y. Wenceslas, M.N.Y. Patrick, F.D.G. Aurelie and M. Jean, 2007. Jumping plant-lice of the family Triozidae (Hemiptera: Psylloidea) from Cameroon: Biodiversity and host plants. J. Entomol., 4: 181-193.
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23:  Vondracek, k., 1963. Jumping plant lice (Psylloidea-Homoptera) of central Africa. Par I (Congo). Sbornik Entomologickeho Oddeleni Narodniho Musea v Praze, 35: 263-290.

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