Observations upon Stenostomum œsophagium

The male gonad and gonopore lie dorsal to the anterior end of the pharynx. There is no female gonoduct. The absence of a female gonoduct is correlated with a peculiar mode of copulation. Egg-formation and egg-deposition bring about a crisis in the life of the individual which is not necessarily fata...

Full description

Saved in:
Bibliographic Details
Published in:The Biological bulletin (Lancaster) 1933-06, Vol.64 (3), p.405-417
Main Authors: Wm. A. Kepner, Carter, Jeanette S., Hess, Margaret
Format: Article
Language:English
Subjects:
Epidermis
Epithelium
Female animals
Gonads
Male animals
Mating behavior
Ova
Ovaries
Penis
Pharynx
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The male gonad and gonopore lie dorsal to the anterior end of the pharynx. There is no female gonoduct. The absence of a female gonoduct is correlated with a peculiar mode of copulation. Egg-formation and egg-deposition bring about a crisis in the life of the individual which is not necessarily fatal. Extensive dedifferentiation and phagocytosis are associated with the development of the egg. After the egg has been laid, a new "head" is developed. Development of male gonads, in this rhabdocœle, appears to be dependent upon extrinsic rather than intrinsic factors.
ISSN:0006-3185
1939-8697
DOI:10.2307/1537206