Jamieson B.G.M., Guinot D., Richer de Forges Bertrand. (1993). The spermatozoon of Calocarcinus africanus (Heterotremata, Brachyura, Crustacea) : ultrastructural synapomorphies with xanthid sperm. Invertebrate Reproduction and Development, p. 189-196. ISSN 0168-8170.
Titre du document
The spermatozoon of Calocarcinus africanus (Heterotremata, Brachyura, Crustacea) : ultrastructural synapomorphies with xanthid sperm
Année de publication
1993
Type de document
Article
Auteurs
Jamieson B.G.M., Guinot D., Richer de Forges Bertrand
Source
Invertebrate Reproduction and Development, 1993,
p. 189-196 ISSN 0168-8170
Features of the spermatozoon of Calocarcinus africanus which are general for heterotremes and endorse its inclusion in the Heterotremata are : extension of the subacrosomal chamber almost to the anterior apex of the sperm, presence of an acrosome ray zone, and presence of a thickened ring where the capsule surrounds the base of the subacrosomal chamber. A feature shared with "higher" heterotremes is the restriction of cytoplasm to the periacrosomal region, the arms being nuclear only, in contrast with invasion of their chromatin with cytoplasm and microtubules in majids; and loss of a posterior median process, containing chromatin with cytoplasm and microtubules in majids; and loss of a posterior median process, containing chromatin, which is presend in majids as in raninids and homolids. (D'après résumé d'auteur)
