International Journal of Zoological Research1811-97781811-9786Academic Journals Inc.10.3923/ijzr.2007.1.13Eryx jayakari (Squamata, Reptilia)]]>Al-DokhiO. A.OnazeeY.Z. Al-MubarakM. 1200731The ultrastucture of the snake Eryx jayakari (E. jayakari) mature sperm has not been published. Therefore, the present study was conducted to elucidate the sperm ultrastructure of this species in comparison with that of other reptilian species. The present investigation has shown that mature spermatozoa of Eryx jayakari are filiform in shape averaging 45 μm (mean of 10) in length with a curved head measuring 9 μm. The acrosomal complex, which involves the acrosomal cap and subacrosomal material, measures 2.5 μm. The nucleus is 6.5 μm in length, the neck approximates 1 μm and the tail (midpiece, principal piece and endpiece) is maximally 35 μm in length. The different tail pieces vary in diameter, being the largest at the midpiece (0.66 μm), diminished at the principal piece (0.36 μm) and the least at the endpiece (0.25 μm). The midpiece, the longest tail piece, is composed of mitochondrial and fibrous sheaths encircling the microtubular axoneme. The mitochondria are rod-shaped having linear cristae but no dense bodies interrupt their arrangement. The principal tail piece consists of the microtubular axoneme surrounded by the fibrous sheath. The endpiece involves only an axoneme enveloped within the plasmalemma of the spermatozoon. The present findings were discussed in relation to other relevant studies. It was concluded that the general ultrastucture of the E. jayakari spermatozoon conforms to that reported to be typical of squamates.]]>Al-Dokhi, O.A.,1996Scincus mitranus (Anderson, 1871) (Squamata, Reptilia).]]>14471482Al-Dokhi, O.A. and S. Al-Wasel,2001Maurymes caspica (Chelonia, Reptilia), I: The acrosomal vesicle and the endonuclear canals formation.]]>3693106Al-Dokhi, O.A. and S. Al-Wasel,2001Maurymes caspica (Chelonia, Reptilia), II: The nucleus elongation and chromatin condensation.]]>15355366Al-Dokhi, O.A.,2004Cerastes cerastes (Squamata, Reptilia).]]>4111116Al-Hajj, H., S. Jankat and F. Mohamoud,1987Agama stellio.]]>6529592968Anderson, W.A., A. Weissman and R.A. Ellis,196671113Austin, C.R.,196512452462Benton, M.C.,19858497164Boisson, C. and X. Mattei,1966Python sebea (Gmelin), obsevee au microscope electronique.]]>8363390Butler, R. and M. Gabri,1984Podarcis (Lacerta) taurica.]]>88261274Clark, A.,1967121369400Courtens, J.L. and A. Depeiges,1985Lacerta vivipara.]]>90203220Da Cruz-Landim C. and M. da Cruz-Hoffling,1977Tropidurus torquatus (Lacertilia).]]>30151162Dehlawi, G.Y. and M.F. Ismail,1990217989Dehlawi, G.Y. and M.F. Ismail,1991Stenodactyius selevini.]]>147181Dehlawi, G.Y. and M.F. Ismail,199425195106Del Conte, E.,1976171483498Fawcett, D.W.,19754394436Fawcett, D.W.,19812nd Edn.,Fawcett, D.W.,19911991Furieri, P.,196541478480Furieri, P.,19701970pp: 115-131pp: 115-131Furieri, P.,1974Agentinean iguanids.]]>67233251Hamilton, D. and D.W. Fawcett,1968238197Healy, J.M. and B.G.M. Jamieson,1992Sphenodon punctatus) and its relevance to the relationships of the sphenodontia.]]>335193205Healy, J.M. and B.G.M. Jamieson,1994Sphenodon punctatus (Sphenodontida, Amniota).]]>344187199Ismail, M.F., G.Y. Dehlawi and O.M. Sarhan,1995Echis carinatus (Serpents, Viperidae).]]>265965Jamieson, B.G.M. and J.M. Healy,1992Sphenodon (Sphenodontida, Amniota), as indicated by cladistic analysis of the ultrastructure of spermatozoa.]]>335207219Jamieson, B.G.M. and D.M. Scheltinga,1993Nangura spinosa (Scincidae, Reptilia).]]>34169179Jamieson, B.G.M. and L. Koehler,1994Nerodia stepdon (Colubridae, Serpents), with phylogenetic considerations.]]>7216481652Jamieson, B.G.M.,19951995pp: 359-383pp: 359-383Jamieson, B.G.M., S.C. Oliver and D.M. Scheltinga,19967785100Jamieson, B.G.M., D.M. Scheltinga and A.D. Tucker,199729265274Nagano, T.,196214193205Oliver, S.C., B.G.M., Jamieson and D.M. Sceltinga,199652216241Philips, D.M. and C.S. Asa,19931993pp: 997-1000pp: 997-1000Porter, K.R.,19651965pp: 95-124pp: 95-124Sprando, R.L. and L.D. Russel,1988Gallus domesticus): A study of cytoplasmic events including cell volume changes and cytoplasmic elimination.]]>19895118Teixeira, R.D., G.R. Colli and S.N. Bjo,1999Micrablepharus maximiliani (Squamata, Gymnophthalmidae), with considerations on the use of sperm ultrastructure characters in phylogenetic reconstruction.]]>804759Teixeira, R.D., G.H.C. Vieira, G.R. Colli and S.N. Bjo,1999Polychrus acutirostris (Squamata, Polychrotidae).]]>31387395Teixeira, R.D., G.H.C. Vieira, G.R. Colli and S.N. Bjo,1999Tropidurus semitaeniatus and Tropidurus torquatus (Squamata, tropiduridae).]]>31308317Vieira, G.H.C., G.R. Coli and N. Bao,2004Iguana iguana (Reptilia, Squamata, Iguanidae) and the variability of sperm morphology among.]]>204451464