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Sperm ultrastructure in Kellia suborbicularis (Bivalvia: Galeommatoidea: Kellidae)
Author(s) -
Jespersen Å.,
Lützen J.
Publication year - 2007
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.2007.00251.x
Subject(s) - biology , sperm , acrosome , ultrastructure , anatomy , brood , nucleus , zoology , microbiology and biotechnology , botany
The sperm cells of Kellia suborbicularis are narrow with a short bullet‐shaped acrosome, a 5.0–5.5 µm long and 0.4–0.6 µm broad nucleus, and a short midpiece with a ring of five mitochondria. The disposition of the subacrosomal substance into a coronet‐like formation is unique, and the sperm structure offers no clue to the relationship between Kellia and other galeommatoidean genera. The possible significance of narrow elongate sperm for their entry into the brood pouch is discussed.