Sperm and spermiogenesis in Opisthoteuthis persephone (octopoda: Cirrata): Ultrastructure, comparison with other cephalopods and evolutionary significance

Healy J.M. (1993) Sperm and spermiogenesis in Opisthoteuthis persephone (octopoda: Cirrata): Ultrastructure, comparison with other cephalopods and evolutionary significance. Journal of Molluscan Studies, 59 1: 105-115. doi:10.1093/mollus/59.1.105


Author Healy J.M.
Title Sperm and spermiogenesis in Opisthoteuthis persephone (octopoda: Cirrata): Ultrastructure, comparison with other cephalopods and evolutionary significance
Journal name Journal of Molluscan Studies   Check publisher's open access policy
ISSN 0260-1230
Publication date 1993-01-01
Sub-type Article (original research)
DOI 10.1093/mollus/59.1.105
Open Access Status Not yet assessed
Volume 59
Issue 1
Start page 105
End page 115
Total pages 11
Subject 1804 Statistics, Probability and Uncertainty
2604 Applied Mathematics
2303 Ecology
1105 Dentistry
1103 Clinical Sciences
1104 Complementary and Alternative Medicine
Abstract Ultrastructural features of spermiogenesis and mature spermatozoa are described for the first time in a cirrate octopod. Comparison with other investigated cephalopod species shows that spermatozoa of Opisthoteuthis persephone Berry most closely resemble those of the genus Octopus. The shared features include: (1) an elongate, solid acrosome with internal banding and a prominent helical keel; (2) a straight, rod-like nucleus; (3) a short midpiece and (4) a post-mitochondrial ('annular') skirt. Of these, the acrosomal morphology is most significant taxo-nomically, as the internal banding of the acrosomal vesicle only occurs in the Octopoda. Spermatozoa of Opisthoteuthis and Octopus differ however in the extent of the internal banding of the acrosome (poorly developed in Opisthoteuthis) and substructure of the acrosomal keel (more complex in Opisthoteuthis). Surprisingly, the extensive fibrous plug of Octopus and Vampyroteuthis sperm, is not developed either in Opisthoteuthis or in Eledone. Results provide additional support for the monophyly of the Octopoda but also hint at the possibility that some groups of in-cirrates may not be as advanced as generally believed.
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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