Onisimus turgidus (Sars, 1879) (Amphipoda, Uristidae), an overlooked amphipod from sea anemones in Northern Norway

Wim VADER, Jan Roger JOHNSEN & Anne Helene S. TANDBERG

en European Journal of Taxonomy 724 (34) - Pages 34-50

Published on 18 November 2020

Two Norwegian uristid amphipods, obligate associates of sea anemones, have for a long time been confused sub nomine Onisimus normani Sars, 1890. In reality this species only occurs in south Norway, while the north-Norwegian material belongs to O. turgidus (Sars, 1879), described from the Barents Sea and for a long time forgotten. This paper fully illustrates both species, gives a key, and provides data on their distribution and ecology.

Sibling species, Crustacea, species complex
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