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Dikwa andresi, a new amphipod crustacean (Dikwidae) from the Scotia Arc

Published online by Cambridge University Press:  12 August 2003

Anne-Nina Lörz  and
Charles Oliver Coleman
Anne-Nina Lörz
Affiliation:
Zoologisches Institut und Zoologisches Museum, Universität Hamburg, Martin-Luther-King-Platz 3, D-20146 Hamburg, Germany, E-mail: aloerz@uni-hamburg.de
Charles Oliver Coleman
Affiliation:
Museum für Naturkunde, Institut für Systematische Zoologie, Invalidenstraße 43, D-10115 Berlin, Germany, E-mail: oliver.coleman@rz.hu-berlin.de
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Abstract

The new amphipod crustacean species Dikwa andresi from the Scotia Arc is described in detail. This is the first record of the family Dikwidae in the Southern Ocean. The white species was caught in water depth of 270–290 metres during the Antarctic autumn, living on the red hydrocoral (Hydrozoa) Errinopsis reticulum. It has a carinate pereon and pleon, no eyes and the head is telescoped into the first pereon segment. The first gnathopod is propodochelate, the second gnathopod is simple. The only known species of the family is Dikwa acrania from southern Africa. The new species mainly differs from D. acrania in having dorsal processes on all pereonites and the first coxa being twice as long as the second. An intraspecific variation of the shape of the telson was observed.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 83 , Issue 4 , August 2003 , pp. 785 - 788
Copyright
2003 Marine Biological Association of the United Kingdom

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