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Studies on the germ cell cycle of the digenetic trematode Parorchis acanthus Nicoll

Part I. Anatomy of the genitalia and gametogenesis in the adult

Published online by Cambridge University Press:  06 April 2009

Gwendolen Rees
Gwendolen Rees
Affiliation:
Department of Zoology, University College of Wales, Aberystwyth
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Extract

1. The anatomy of the male and female genitalia of Parorchis acanthus is described in detail. An extensive receptaculum uterinum occurs in the female system.

2. The chromosome number in P. acanthus is twenty-two.

3. Spermatogenesis, oogenesis, and fertilization, are described in the adult worm. The chromosome number in both male and female cells is reduced to eleven at the first meiotic division.

4. Maturation in the female takes place in the “receptaculum uterinum”.

5. Cleavage of the ovum to the three cell stage has been followed.

6. The probable synonymy of P. acanthus and P. avitus is discussed.

Type
Research Article
Information
Parasitology , Volume 31 , Issue 4 , December 1939 , pp. 417 - 433
Copyright
Copyright © Cambridge University Press 1939

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