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Issue: Vol. 2408 No. 1: 24 Mar. 2010
Type: Articles
Published: 2010-03-24
DOI: 10.11646/zootaxa.2408.1.3
Page range: 47–58
Abstract views: 50
PDF downloaded: 2

On Amphibolocypris arida sp.nov. (Crustacea, Ostracoda), from rock pools in Botswana (southern Africa)

K.U.Leuven, Laboratory of Aquatic Ecology and Evolutionary Biology, De Bériotstraat 32, 3000 Leuven, Belgium and Central Laboratory of General Ecology, Bulgarian Academy of Sciences, 2 Yurii Gagarin Street, 1113 Sofia, Bulgaria Laboratory of Aquatic Ecology and Evolutionary Biology, Katholieke Universiteit Leuven, Ch. De Bériotstraat 32, B-3000 Leuven, Belgium
K.U.Leuven, Laboratory of Aquatic Ecology and Evolutionary Biology, De Bériotstraat 32, 3000 Leuven, Belgium and Central Laboratory of General Ecology, Bulgarian Academy of Sciences, 2 Yurii Gagarin Street, 1113 Sofia, Bulgaria
School of Life Sciences, Oxford Brookes University, Headington Campus, Gipsy Lane, Oxford, OX3 0BP, U.K.
Koninklijk Belgisch Instituut voot Natuurwetenschappen, Afdeling Zoetwaterbiologie (Royal Belgian Institute of Natural Sciences, Freshwater Biology), Vautierstraat 29, B-1000 Brussels, Belgium and University of Ghent, Biology, K.L. Ledeganckstraat 35, B9000 Gent, Belgium
Crustacea phylogeny taxonomy temporary pools sexual selection convergent evolution western Cape

Abstract

The ostracod fauna of southern Africa remains ill-known, in spite of the fact that the temporary pools of this zoogeographical region hold degrees of endemicity comparable only to those of the ancient lakes of East Africa. The present contribution describes a new species of the cypridid genus Amphibolocypris, A. arida sp.nov., and announces the existence of at least two further new species from the same area. The genus, up to now presumed monospecific, might constitute an extensive radiation across southern Africa. Unusually large species-specific differences in hemipenis outline morphology appear to indicate that speciation occurred through sexual, rather than through natural selection. The occurrence of the claw-like subapical seta on the walking limb in at least four genera could be a case of convergent evolution, at least in one, maybe even in two cases between species of different genera and even subfamilies.

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