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- Title
Comparative ultrastructure of the spermatozoa of the Majoidea ( Crustacea, Decapoda, Brachyura) with new data on six species in five genera.
- Authors
Tudge, Christopher C.; Scheltinga, David M.; Jamieson, Barrie G. M.; Guinot, Danièle; Richer de Forges, Bertrand
- Abstract
Comparative ultrastructure of majoid spermatozoa belonging to 23 species, in 19 genera and five families, is considered, with new data on Schizophrys aspera; S. rufescens ( Majidae, Majinae); Camposcia retusa ( Inachidae); Pyromaia tuberculata ( Inachoididae); and Huenia heraldica and Menaethius monoceros ( Epialtidae, Epialtinae). The oregoniid Chionoecetes opilio, and inachids Cyrtomaia furici, Platymaia rebierei, Macropodia longirostris and Inachus phalangium, possibly with Camposcia retusa, but not Podochela riisei, appear to form a group. Within the inachids, Macropodia and Inachus are especially close. A domed central acrosome zone, seen in most inachid sperm, in majines (both Schizophrys species), in pisines ( Oxypleurodon orbiculatus and O. stuckiae) and epialtines ( Huenia heraldica and Menaethius monoceros), appears to be an autapomorphy of these majoids. A peripheral acrosome zone is seen in the inachid Grypacheus hyalinus, two inachoidids ( P. tuberculata and Stenorhynchus seticornis) and the majid Maja squinado. Pyromaia tuberculata differs from other inachoidids in having a slightly dome-shaped operculum. The mithracine Macrocoeloma trispinosum ( Majidae) sperm more closely resembles Inachoididae, than Inachidae. Spermatologically, the family Majidae and the subfamily Majinae are not homogeneous. Spermatozoal ultrastructure does not support a majoid-hymenosomatid relationship and is equivocal with regard to the placement of Cryptochiridae in either the Thoracotremata or Heterotremata, the prominent operculum strongly differentiates cryptochirids from Majoidea.
- Subjects
COMPARATIVE anatomy; ULTRASTRUCTURE (Biology); SPERMATOZOA; CRUSTACEA; HYMENOSOMATIDAE; CRYPTOCHIRIDAE; AUTAPOMORPHY
- Publication
Acta Zoologica, 2014, Vol 95, Issue 1, p1
- ISSN
0001-7272
- Publication type
Article
- DOI
10.1111/azo.12005