Biol. Bull. Sign up for etocs!
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Morisawa, S.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Morisawa, S.

The Biological Bulletin, Vol 189, Issue 1 6-12, Copyright © 1995 by Marine Biological Laboratory

DEVELOPMENT AND REPRODUCTION

Fine Structure of Spermatozoa of the Hagfish Eptatretus burgeri (Agnatha)1

S. Morisawa
Biological Laboratory, St. Marianna University, School of Medicine, 2-16-1 Sugao, Miyamae, Kawasaki 216, Japan

Live motile spermatozoa of the hagfish Eptatretus burgeri were obtained for the first time, and their fine structure was examined. The spermatozoon is characterized by an extremely long midpiece. Two of the four midpiece mitochondria are extensively elongated and extend through almost the entire length of the tail. The acrosome contains electron-dense and less dense materials in two different compartments. Amorphous subacrosomal material lies between the acrosome and the nucleus. No distinct perforatorium rod or filamentous structure was observed within the subacrosomal material. Two centrioles lie almost end to end in the nuclear fossa near the posterior end of the nucleus. The structure of the acrosomal complex in the hagfish, which is quite different from that in the lamprey, was compared to that of other chordates with respect to its function in sperm-egg interaction and phylogeny.


This article has been cited by other articles:


Home page
 Biol. Bull.Home page
S. Morisawa
Spermiogenesis in the Hagfish Eptatretus burgeri (Agnatha)
Biol. Bull., December 1, 2005; 209(3): 204 - 214.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1995 by the Marine Biological Laboratory.