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Ultrastructure of the spermatozoon of the digenean Cricocephalus albus (Kuhl & van Hasselt, 1822) Looss, 1899 (Platyhelminthes, Pronocephaloidea, Pronocephalidae), parasite of “the hawksbill sea turtle”Eretmochelys imbricata ...
- Source :
- Zoologischer Anzeiger - A Journal of Comparative Zoology; Sep2011, Vol. 250 Issue 3, p215-222, 8p
- Publication Year :
- 2011
-
Abstract
- Abstract: The mature spermatozoon of Cricocephalus albus is filiform, tapered at both ends and shows the following features: 2 axonemes of different lengths presenting the 9+“1” trepaxonematan pattern, 2 bundles of parallel cortical microtubules, a mitochondrion and a nucleus. Nevertheless, the particularity of the spermatozoon of C. albus is its anterior extremity with an apical electron-dense material associated with extramembranar ornamentation, a cytoplasmic dorsolateral expansion and spine-like bodies. To our knowledge, such an anterior extremity of the spermatozoon has not previously been described from a species of the superfamily Pronocephaloidea. Our study provides new data on the mature gamete of C. albus in order to improve our understanding of the pronocephaloidean phylogenetic relationships. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00445231
- Volume :
- 250
- Issue :
- 3
- Database :
- Supplemental Index
- Journal :
- Zoologischer Anzeiger - A Journal of Comparative Zoology
- Publication Type :
- Academic Journal
- Accession number :
- 64714137
- Full Text :
- https://doi.org/10.1016/j.jcz.2011.04.002