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Morphological abnormalities in the stauromedusa Haliclystus auricula (Cnidaria) and their possible causes

Published online by Cambridge University Press:  25 March 2008

Carolina J. Zagal
Carolina J. Zagal*
Affiliation:
Centre for Research on the Ecological Impacts of Coastal Cities, Marine Ecology Laboratories A11, the University of Sydney, New South Wales 2006, Australia
*
Correspondence should be addressed to: Carolina J. Zagal Centre for Research on the Ecological Impacts of Coastal Cities Marine Ecology Laboratories A11The University of SydneyNew South Wales 2006Australia email: czagal@eicc.bio.usyd.edu.au
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Abstract

Morphological abnormalities were observed in a population of the stauromedusa Haliclystus auricula in southern Chile. A total of 144 abnormal specimens was observed out of 3790 Stauromedusae sampled. The following abnormalities are described: individuals lacking arms (73%), with more than eight anchors (11%), more than eight arms (8%), lacking anchors (4%) and one individual with tentacles in abnormal locations. An individual with two peduncles, one with two mouths and one twin-like individual are recorded for the first time in this species. Their possible causes are discussed.

Keywords

abnormalitiesMedusaeHaliclystusmorphological variationStauromedusae
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 88 , Issue 2 , March 2008 , pp. 259 - 262
Copyright
Copyright © Marine Biological Association of the United Kingdom 2008

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