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The functional anatomy of the anterior end of Skrjabinoptera goldmanae from Australian agamid lizards

Published online by Cambridge University Press:  05 June 2009

H.I. Jones
H.I. Jones*
Affiliation:
Department of Zoology, University of Western Australia, Nedlands, 6009, Western Australia
*
East Metropolitan Health Authority, PO Box J710, Perth 6001, Western Australia
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Abstract

Four muscle groups are responsible for the eversion and retraction of the apical denticles and enlarged pseudolabia in Skrjabinoptera goldmanae (Nematoda: Physalopteridae), which occurs in the lizards Chlamydosaurus kingii, Pogona spp. and Varanus gouldii in Australia. These muscles enable the nematode to bury its anterior portion in the gastric submucosa of its hosts. They comprise three sets which are derived from the somatic musculature and are inserted in the oesophagus and associated organs, and a fourth set of muscles which appears to be derived from the muscular oesophagus itself. These accessory muscle groups are described and illustrated, and from this their mode of action in everting and retracting the pseudolabia is derived. Possible selection pressures which led to their evolution are reviewed.

Type
Research Papers
Information
Journal of Helminthology , Volume 69 , Issue 1 , March 1995 , pp. 33 - 37
Copyright
Copyright © Cambridge University Press 1995

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