Abstract: The present paper deals with a rare Specimen belonging to genus 'Calamospore'. Schaff, Wilson and Bentall (1944) the specimen is large in size as campared to other sps. Of the genus Calamospora. So it was placed in separate group (Megaspare group). Its size is 3927 μm-3465 μm.
The flora of Permian period is quite different from the neighboring eras (Carboniferous/and from succeeding Triassic period. During later stage Permian miospores were studied by a no of Palynologist. Virkki (1946) Studied the Permian Palynofiora of Australia and Katwai assemblage. Balme (1970) studied many samples from Salt Range with age from Lower Permian to late Triassic (Chhidru formation and Mianwali formation). Abundent Plant micro fossils and same megafossils were obtained from the Permian material showing great divercification in the Paiynomorph. The Permian Miospores of Pakistan have been comprehensively discussed by Masood (1983) and Khurshid (1997). Calamospora genus has been frequently used for Permian and early mesozoic sports. Many of the dispersed spores assigned to Calarnospora and undoubted of Calamana origin. Calarnospora (Mega sore group) is a pare Species and only are Miospore of such large size are found at the depth of 2312 ft. of Borehole near Jhang Punjab (Fig. 1).
| Fig. 1: | Calamospora sp. Recorded from sample #2312 |
Material has been collected from the Bore hole near Jhang by Geological Survey of Pakistan and provided for by investigation. During the investigation of specimen (at the depth of 2312). This Calamospora (Mega Spore) was found. Macceration and isolation was made as recommended by Smith and Butterworth (1967). The isolated materials was mounted in glycerine jelly and preserved in Palaeobotanical Lab. Punjab University Lahore.
Systematic Position of Calamospora (Megaspore group)
| Anteturma: | Sporites, Protonie (1956). |
| Turma: | Trilete, Dettmann (1963). |
| Suprasubturma: | Acavatitriletes, Dettmann (1963). |
| Subturmo: | Azonotriletes Luber, Dettmann (1963). |
| Infraturma: | Laevigate, Protonie (1956). |
| Genus: | Calamospora |
| Type species: | Calamospore hartunglana, Schopf et al. (1944). |
Calamospora (Mega Spore)
| Description: | Megaspore and subcircula, trilete marking not distinct, exine thin, Infra-Punctate±μm thick exinal folds, many and variable size. Dark in colour. Margin undulating. |
| Dimensions: | Specimen Collected 1 (one) Equational diameter 3927 urn and 3465 μm. |
Comparison
Size Variation present in genus Calamospora from 40 μm to many hundred microns. Longer spores often possess a high gloss when by reflected light. Trilete marking very short sometime not much distinct. Only one such specimen has been found which is of very large size (3927 μm and 3465 μm), having the characters of Calamospora group. Thin exine, many exinal folds. On the basis of these characters this spore is placed in Calamospora mega Spore group. It is found at the depth of 2312 ft. From 'Bore hole' near Jhang.