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The life-cycle of Echinoparyphium hydromyos sp.nov. (Digenea: Echinostomatidae) from the Australian water-rat

Published online by Cambridge University Press:  06 April 2009

L. Madeline Angel
L. Madeline Angel
Affiliation:
Zoology Department, University of Adelaide, South Australia
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Extract

Echinoparyphium hydromyos sp.nov. with forty-five collar spines is described from the Australian water rat, Hydromys chrysogaster Geoffr.

The cercaria occurs naturally in Plananisus isingi (Cotton & Godfrey), and all stages in the life-history have been demonstrated experimentally.

Encystation occurs in the kidneys of tadpoles.

The adult is most closely related to Echinoparyphium recurvatum (Linstow). It differs from this in its greater number of eggs and in its life-history. E. recurvatum occurs predominantly in birds, and is rarely found naturally in mammals. E. hydromyos has been found only in a mammal.

Cercaria echinoparyphii hydromyos is compared with C. clelandae Johnston and Angel; it differs from the latter in the ‘compound’ nature of the excretory granules. The adult of C. clelandae has not been demonstrated in spite of a number of experiments to determine it.

Type material has been deposited in the South Australian Museum.

I wish to acknowledge the help given by my colleague, Patricia M. Thomas, in field work and in other ways, and by Mr Ian Smith, of this department, in the experimental work on life-history studies.

Type
Research Article
Information
Parasitology , Volume 57 , Issue 1 , February 1967 , pp. 19 - 30
Copyright
Copyright © Cambridge University Press 1967

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