The ultrastructure of the spermatozoa of petalomera lateralis (Gray) (crustacea, brachyura, dromiacea) and its phylogenetic significance

Jamieson B.G.M. (1990) The ultrastructure of the spermatozoa of petalomera lateralis (Gray) (crustacea, brachyura, dromiacea) and its phylogenetic significance. Invertebrate Reproduction and Development, 17 1: 39-45. doi:10.1080/07924259.1990.9672086


Author Jamieson B.G.M.
Title The ultrastructure of the spermatozoa of petalomera lateralis (Gray) (crustacea, brachyura, dromiacea) and its phylogenetic significance
Journal name Invertebrate Reproduction and Development   Check publisher's open access policy
ISSN 0792-4259
Publication date 1990-01-01
Sub-type Article (original research)
DOI 10.1080/07924259.1990.9672086
Open Access Status Not yet assessed
Volume 17
Issue 1
Start page 39
End page 45
Total pages 7
Subject 1103 Clinical Sciences
1309 Developmental Biology
Abstract The dromiid sperm, as exemplified by Petalomera lateralis and Dromidia antillensis, differs markedly from spermatozoa of other crabs (the Oxystomata-Oxyrhyncha-Cancridea-Brachygnatha assemblage) in the discoid, relatively undifferentiated acrosome capping and not embedded in the nucleus (plesiomoiphies); the capitate form of the perforatorium and the composition of this (autapomorphies); the greater, apomorphic, reduction of cytoplasm and organelles, including mitochondria and ccntrioles; and the absence (Petalomera) or brevity (Dromidia) of nuclear arms. In view of some similarities of the acrosome to those of Eubrachyura suggestive of relationship, brevity of arms may be secondary by reduction. Presence of well developed nuclear arms is a synapomorphy of all investigated non-dromiid brachyurans and of the Palinura, Astacidea and Anomura while absence is a symplesiomorphy of other Malacostraca. If brevity of arms in dromiids were plesiomorphic, the Dromiacea might be derived from early decapods before evolution of the Palinura-Astacidea-Anomura-Brachyura assemblage as suggested by their non-brachyuran, anomuran type larvae. If dromiids are monophyletic with true crabs, zocal morphology would demand a basal position in the Brachyura. Exclusion of Raninoidca from the Dromiacea, or from a podotreme group consisting of the Dromiacea-Archaeobrachyura, is advocated in view of clear synapomorphies of raninoid sperm with those of the Oxystomata-Oxyrhyncha-Cancridea-Brachygnatha assemblage (e.g. spherical, embedded, more complexly zoned acrosome) which are not seen in dromiids.
Keyword Brachyura
Dromiidae
Phylogeny
Spermatozoon
Ultrastructure
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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