Jamieson B.G.M., Guinot D., Richer de Forges Bertrand. (1993). The ultrastructure of the spermatozoon of Paradynome tuberculata Sakai, 1963 (Crustacea, Brachyura, Dynomenidae) : synapomorphies with dromiid sperm. Helgoländer Meeresuntersuchungen, 47, p. 311-322. ISSN 0174-3597.
Titre du document
The ultrastructure of the spermatozoon of Paradynome tuberculata Sakai, 1963 (Crustacea, Brachyura, Dynomenidae) : synapomorphies with dromiid sperm
Année de publication
1993
Type de document
Article
Auteurs
Jamieson B.G.M., Guinot D., Richer de Forges Bertrand
Source
Helgoländer Meeresuntersuchungen, 1993,
47, p. 311-322 ISSN 0174-3597
The dynomenid spermatozoon, exemplified here by Paradynomene tuberculata, resembles the spermatozoa of the Dromiidae, Homolidae and lyreidine raninoids and differs markedly from those of other crabs (the heterotreme, thoracotremes, raninines and raninoidines) in the depressed, discoidal form of the acrosome and the capitate form of the perforatorium. Four of five apparent dynomenid - dromiid sperm synapomorphies are recognizable. (1) Dynomenids (P. tuberculata) and dromiids differ from homolids and lyreidines in the greater depression of the acrosome (ratio of lengh to width = 0.3); (2) the capitate head of the perforatorium is bilaterally prolonged in P. tuberculata as in dromiids though symmetrical in homolids; (3) dynomenid and dromiid sperm lack the - albeit variably developed - posterior median process of the nucleus seen in homolids, anomurans, raninoids and lower heterotremes. (D'après résumé d'auteur)
