Translator Disclaimer
1 August 2006 SPERMIOGENESIS AND SPERMATOZOON ULTRASTRUCTURE OF THE CESTODE MOSGOVOYIA CTENOIDES (CYCLOPHYLLIDEA: ANOPLOCEPHALIDAE), AN INTESTINAL PARASITE OF ORYCTOLAGUS CUNICULUS (LAGOMORPHA: LEPORIDAE)
Author Affiliations +
Abstract

Ultrastructural characters in spermiogenesis and spermatozoa are considered important tools to elucidate the phylogenetic relationships within the Platyhelminthes. In the Anoplocephalidae, ultrastructural data refer to the spermatozoon of 14 species, whereas data on spermiogenesis refer to only 7 species. The present study focused on the spermiogenesis and spermatozoon of the anoplocephalid cestode Mosgovoyia ctenoides, as revealed by transmission electron microscopy. Type IV spermiogenesis was detected, beginning with the formation of a differentiation zone containing 2 centrioles, with a centriolar adjunct and vestigial striated rootlets. Different forms of the latter character have been described in other anoplocephalids. This study supports spermiogenesis of type IV as the most frequent in the Anoplocephalidae and confirms the presence of a centriolar adjunct in yet another type IV spermiogenesis species. The spermatozoon of M. ctenoides possesses 1 axoneme of the 9 ‘1’ trepaxonematan type, 2 crestlike bodies, dense plates, and granules of electron-dense cytoplasmic material, nucleus, and twisted cortical microtubules. It was again confirmed that the presence of granular material and the absence of both a periaxonemal sheath and intracytoplasmic walls are constant characters in the spermatozoa of all the Anoplocephalinae.

Catarina Eira, Jordi Miquel, José Vingada, and Jordi Torres "SPERMIOGENESIS AND SPERMATOZOON ULTRASTRUCTURE OF THE CESTODE MOSGOVOYIA CTENOIDES (CYCLOPHYLLIDEA: ANOPLOCEPHALIDAE), AN INTESTINAL PARASITE OF ORYCTOLAGUS CUNICULUS (LAGOMORPHA: LEPORIDAE)," Journal of Parasitology 92(4), (1 August 2006). https://doi.org/10.1645/GE-818R.1
Received: 12 December 2005; Accepted: 1 January 2006; Published: 1 August 2006
JOURNAL ARTICLE
11 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top