Euspermatozoa in the marine gastropod epitonium sp. (epitoniidae, janthinoidea) with a discussion of janthinoidean relationships as indicated by sperm ultrastructure

Healy J.M. (1994) Euspermatozoa in the marine gastropod epitonium sp. (epitoniidae, janthinoidea) with a discussion of janthinoidean relationships as indicated by sperm ultrastructure. Invertebrate Reproduction and Development, 26 3: 229-235. doi:10.1080/07924259.1994.9672422


Author Healy J.M.
Title Euspermatozoa in the marine gastropod epitonium sp. (epitoniidae, janthinoidea) with a discussion of janthinoidean relationships as indicated by sperm ultrastructure
Journal name Invertebrate Reproduction and Development   Check publisher's open access policy
ISSN 0792-4259
Publication date 1994-01-01
Sub-type Article (original research)
DOI 10.1080/07924259.1994.9672422
Open Access Status Not yet assessed
Volume 26
Issue 3
Start page 229
End page 235
Total pages 7
Subject 1103 Clinical Sciences
1309 Developmental Biology
1307 Cell Biology
Abstract Euspermatozoa (fertilizing sperm) of Epitonium sp. consist of a conical acrosomal vesicle (featuring an apical bleb, and accompanied by an axial rod, basal plate and accessory membrane); a solid,-rod-shaped nucleus with a shallow centriolar invagination at its base; a midpiece composed of a 9 + 2 axoneme surrounded by 7 - 8 helical mitochondria; an annulus; a glycogen piece (axoneme surrounded by nine tracts of granules; and a short end piece. Morphologically these cells resemble not only those of other Janthinoidea (other Epitoniidae and the Janthinidae) but also euspermatozoa of several other groups of Caenogastropoda. Eusperm and parasperm ultrastructure supports a close relationship between the Janthinoidea and the Triphoroidea (Triphoridae, Cerithiopsidae). Sperm data also clearly demonstrate that the Janthinoidea have no connection with the heterobranch superfamilies Architectonicoidea or Pyramidelloidea.
Keyword Classification
Epitonium
Mollusca
Spermatozoa
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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