An ultrastructural study of the spermatozoa from Prionospio cf. queenslandica and Tripolydora sp.: Two spionid polychaetes with different reproductive methods

Rouse G.W. (1988) An ultrastructural study of the spermatozoa from Prionospio cf. queenslandica and Tripolydora sp.: Two spionid polychaetes with different reproductive methods. Acta Zoologica, 69 4: 205-216.

Author Rouse G.W.
Title An ultrastructural study of the spermatozoa from Prionospio cf. queenslandica and Tripolydora sp.: Two spionid polychaetes with different reproductive methods
Journal name Acta Zoologica   Check publisher's open access policy
ISSN 0001-7272
Publication date 1988
Sub-type Article (original research)
Volume 69
Issue 4
Start page 205
End page 216
Total pages 12
Subject 1103 Clinical Sciences
Abstract The fine structure of the spermatozoa of two spionids is described. The spermatozoon of Prionospio cf. queenslandica is typical of an animal utilizing external fertilization, in having a subspheroidal nucleus, a midpiece composed of unmodified rounded mitochondria surrounding two centrioles and a free flagellum. The acrosome is unusual in showing bilateral symmetry. The spermatozoon of Tripolydora sp. resembles that of spionids utilizing spermatophores, in possessing an extremely elongate nucleus and midpiece. The nucleus is penetrated by the 9+2 axoneme for its entire length, linking with a single centriole at the anterior end. Platelets surround the nucleus and intermingle with the mitochondria of the midpiece, which terminates with an annulus. The acrosome shows some internal vesiculation and substructuring. Sperm structure in relation to reproductive methods is discussed and the view of external fertilization as primitive is questioned.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 14 Jun 2016, 07:05:45 EST by System User