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Publikováno v:
Anatomia, Histologia, Embryologia. 49:814-819
It remains a major concern that sperm structure has continued to be poorly investigated and reported in avian species. To our knowledge, sperm structure in the order Pelecaniforme has not been reported. Although McFarlane (1963; Proceedings of the XI
Publikováno v:
Tissuecell. 68
Avian species comprise more than half of all vertebrates yet there is a dearth of information regarding spermatid development in this class of animals. This report of spermiogenesis in the cattle egret, Bubulcus ibis, is the first in the order Peleca
Publikováno v:
Comptes Rendus Biologies. 336:473-478
Spermiogenesis, in particular the head differentiation of Diplometopon zarudnyi, was studied at the ultrastructural level by Transmission Electron Microscope (TEM). The process includes acrosomal vesicle development, nuclear elongation, chromatin con
Autor:
Roopnarine, Narindra H.1 (AUTHOR) nroopna1@sgu.edu, Gupta, Sunil K.1 (AUTHOR), Plessis, Lizette2 (AUTHOR), Aire, Tom A.1 (AUTHOR)
Publikováno v:
Anatomia, Histologia, Embryologia: Journal of Veterinary Medicine Series C. Nov2020, Vol. 49 Issue 6, p814-819. 6p.
Publikováno v:
Journal of Morphology. 267:1157-1164
The sperm of Caprimulgus europaeus is typical of other nonpasserines in many respects. Features shared with Paleognathae and Galloanserae are the conical acrosome, shorter than the nucleus; the presence of a perforatorium and endonuclear canal; the p
Autor:
J. T. Soley
Publikováno v:
Journal of Morphology. 227:101-111
The acrosomal complex of ostrich sperm consists of a small, cone-shaped acrosome and a slender, cylindrical perforatorium housed within a deep endonuclear canal. The perforatorium is almost exclusively endonuclear in location and is only covered by t
Autor:
Barrie G. M. Jamieson, Sandro Tripepi
Publikováno v:
Acta Zoologica. 86:239-244
The spermatozoon of Apus apus is typical of non-passerines in many respects. Features shared with palaeognaths and the Galloanserae are the conical acrosome, shorter than the nucleus; the presence of a proximal as well as distal centriole; the elonga
Publikováno v:
Journal of Morphology. 262:484-499
Spermiogenesis, known as spermateleosis in lower vertebrates, is the transformation of the round spermatid into a highly specialized spermatozoon with a species-specific structure. Spermateleosis and sperm morphology of two species of caecilians, Ich
Publikováno v:
Molecular Reproduction and Development. 70:373-381
The internally fertilizing primitive frog Ascaphus truei (family Ascaphidae) from the Pacific Northwest is the only frog with an intromittent organ. The more advanced neobatrachian frog Eleutherodactylus coqui (family Leptodactylidae) from Puerto Ric