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Titolo:
Spermatophore transfer and sperm structure in the brachyuran crab Metopograpsus messor (Decapoda : Grapsidae)
Autore:
Anilkumar, G; Sudha, K; Subramoniam, T;
Indirizzi:
Sree Narayana Coll, Post Grad Dept Zool, Cannanore 670007, Kerala, India Sree Narayana Coll Cannanore Kerala India 670007 re 670007, Kerala, India Univ Madras, Dept Zool, Madras 600025, Tamil Nadu, India Univ Madras Madras Tamil Nadu India 600025 dras 600025, Tamil Nadu, India
Titolo Testata:
JOURNAL OF CRUSTACEAN BIOLOGY
fascicolo: 2, volume: 19, anno: 1999,
pagine: 361 - 370
SICI:
0278-0372(199905)19:2<361:STASSI>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHIONOECETES-OPILIO BRACHYURA; INACHUS-PHALANGIUM; SPIDER CRAB; SNOW CRAB; SPERMATOZOAL ULTRASTRUCTURE; CRUSTACEA; MAJIDAE; PHYLOGENY; STORAGE; ANOMURA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Anilkumar, G Sree Narayana Coll, Post Grad Dept Zool, Cannanore 670007, Kerala, India Sree Narayana Coll Cannanore Kerala India 670007 rala, India
Citazione:
G. Anilkumar et al., "Spermatophore transfer and sperm structure in the brachyuran crab Metopograpsus messor (Decapoda : Grapsidae)", J CRUS BIOL, 19(2), 1999, pp. 361-370

Abstract

In the brachyuran crab Metopograpsus messor mating occurs only among "hard" (intermolt) individuals. Our present light and electron microscopic studies reveal that the spermatophores received by the females during coitus arediscernible within the spermathecae until 24 h postmating. The study demonstrates time-dependent dissolution of the spermatophores of M. messor within the spermathecal lumen. The spermatozoa of M. messor were subjected to electron microscopic analysis. In addition to decapod and brachyuran features, the spermatozoa of M. messor display characters typical of the heterotreme-thoracotreme assemblage crabs, such as acrosomal length:width ratio (1.2), and the concentric arrangement of the acrosomal zones around the perforatorium. While the "onion ring" lamellation of the outer acrosome zone represents a typical thoracotreme character, the occurrence of the accessory opercular ring is indicative of its affinity to the Grapsinae-Sesarminae subfamilies within the Grapsidae.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/07/20 alle ore 22:07:25