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Sequences in the maturation of the genitalia in Tetrabothrius erostris (Loennberg, 1889) from the intestine of Larus argentatus argentatus Pontoppidan

Published online by Cambridge University Press:  06 April 2009

Dilys Rawson
Dilys Rawson
Affiliation:
Queen Elizabeth College, University of London
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Extract

1. A detailed description, with illustrations, is given, of the sequences in development and maturation of the genitalia in Tetrabothrius erostris. This is the first such account of any member of the new order Tetrabothridea.

2. The effect of the very marked protandry on the form of the remainder of the genitalia is discussed.

3. Attention is drawn to the unusual ovary which produces sclerotin and which it is proposed to call a ‘calycal-ovarium’.

4. Comparison is made of the embryophore with that of the Cyclophyllidea. There is a suggestion that the embryophore may be formed of sclerotin in T. erostris.

5. Par-uterine vesicles have been described for the first time in any member of the Tetrabothridea. These vesicles arise from the uterine primordium and have previously been confused with testes.

6. The complex affinities of the order Tetrabothridea are discussed and some support arises for the creation of this new order.

Type
Research Article
Information
Parasitology , Volume 54 , Issue 3 , August 1964 , pp. 453 - 465
Copyright
Copyright © Cambridge University Press 1964

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