Comparative sperm ultrastructure and spermiogenesis in basal heterobranch gastropods (Valvatoidea, Architectonicoidea, Rissoelloidea, Omalogyroidea, Pyramidelloidea) (Mollusca)

Healy J.M. (1993) Comparative sperm ultrastructure and spermiogenesis in basal heterobranch gastropods (Valvatoidea, Architectonicoidea, Rissoelloidea, Omalogyroidea, Pyramidelloidea) (Mollusca). Zoologica Scripta, 22 3: 263-276. doi:10.1111/j.1463-6409.1993.tb00357.x


Author Healy J.M.
Title Comparative sperm ultrastructure and spermiogenesis in basal heterobranch gastropods (Valvatoidea, Architectonicoidea, Rissoelloidea, Omalogyroidea, Pyramidelloidea) (Mollusca)
Journal name Zoologica Scripta   Check publisher's open access policy
ISSN 0300-3256
Publication date 1993-01-01
Sub-type Article (original research)
DOI 10.1111/j.1463-6409.1993.tb00357.x
Open Access Status
Volume 22
Issue 3
Start page 263
End page 276
Total pages 14
Subject 1103 Clinical Sciences
Abstract Three distinct groups of basal heterobranch gastropods (='Allogastropoda/Heterostropha') can be distinguished on the basis of sperm and spermiogenic features: (1) Valvatoidea; (2) Architectonicoidea; (3) Rissoelloidea + Omalogyroidea + Pyramidelloidea. Sperm of pentaganglionate heterobranchs (Opisthobranchia sensu stricto + Pulmonata) conform in all respects to the Pattern shown by group (3). Heterobranchia are united, and differentiated from other gastropods, by a shared suite of sperm and spermiogenic features (rounded acrosomal vesicle, nucleus usually helical, highly modified mitochondrial derivative, spermatid acrosome associated with a dense nuclear plaque, formation of the mitochondrial derivative through fusion of numerous small mitochondria along the length of the axoneme). Sperm autapomorphies of the Architectonicoidea and the Valvatoidea suggest that these two superfamilies are distinct but terminal offshoots from ancestral heterobranchs.
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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