Jamieson B.G.M. auteur aut IRD Guinot D. auteur aut IRD Richer de Forges Bertrand auteur aut IRD text journalArticle eng text/pdf reformatted digital access Spermatozoal synapomorphies which singly or collectively distinguish Raninoidea are : (1) the presence of single (Ranina), Raninoides) or multiple (Lyreidus) keel-like projections of the acrosomal zone (Ranina, Raninoides) and an homologous large outer zone in Lyreidus; (3) poor differentiation of the operculum from the capsule (autapomorphy); (4) a very well developed, perforate subopercular zone, of variable form; (5) presence of unique inward longitudinal projections (septa or corrugations) in the wall of the subacrosomal chamber (autapomorphy). Shared, presumably synapomorphic characters of Ranina and Raninoides but not of Lyreidus within the Raninidae, are (1) branching of some of the subacrosomal septa (unbranched in Lyreidus); (2) the subspheroidal form of the acrosome in Ranina with a lenth : width ratio (L:W) of O.76, and, although slightly more depressed form in Lyreidus (L:W 0.52). (D'après résumé d'auteur) specialized TAXONOMIE ANATOMIE ANIMALE ULTRASTRUCTURE CRUSTACE SPERMATOZOIDE NOUVELLE CALEDONIE 034BIOINV04 239-249 1994 0025-3162 https://www.documentation.ird.fr/hor/fdi:42807 10.1007/BF00349684 0025-3162 [F B42807] https://www.documentation.ird.fr/hor/fdi:42807 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/b_fdi_37-38/42807.pdf IRD - Base Horizon / Pleins textes 1995-11-13 2014-02-14 fdi:42807 fre