Invertebrate Systematics Invertebrate Systematics Society
Systematics, phylogeny and biogeography
RESEARCH ARTICLE

Identification of a cryptic lineage within Potamon fluviatile (Herbst) (Crustacea : Brachyura : Potamidae)

Ruth Jesse A , Christoph D. Schubart B and Sebastian Klaus A C

A Department of Ecology and Evolution, Goethe–Universität, Siesmayerstrasse 70A, D-60054 Frankfurt am Main, Germany.

B Biologie 1, Universität Regensburg, D-93040 Regensburg, Germany.

C Corresponding author. Email: klaus@bio.uni-frankfurt.de

Invertebrate Systematics 24(4) 348-356 http://dx.doi.org/10.1071/IS10014
Submitted: 11 May 2010  Accepted: 16 September 2010   Published: 13 December 2010

Abstract

Based on mitochondrial and nuclear DNA-sequence data we identify and describe an evolutionary separate lineage (Potamon pelops, sp. nov.) within the potamid freshwater crab species Potamon fluviatile (Herbst, 1785). So far, Potamon pelops, sp. nov. is only reported from the Peloponnesus Peninsula (Greece), probably allopatric to P. fluviatile. This cryptic lineage is not identical with the infrasubspecies Potamon fluviatile fluviatile natio laconis Pretzmann, 1983, the latter being within the morphological variation of Potamon fluviatile and Potamon pelops. Morphologically, Potamon pelops, sp. nov. differs from Potamon fluviatile, probably in spermatophore packing (cleistospermia in P. fluviatile versus coeno- and cleistospermia in P. pelops).

Additional keywords: cryptic species, freshwater crab, Greece, Mediterranean, Peloponnesus.


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