title: Redefinition of the GenusTyphlocyprisVejdovský, 1882 (Ostracoda, Candonidae).
abstract: The taxonomy of the genusTyphlocyprisVejdovský, 1882 is reviewed. New morphological information onTyphlocypris eremita(Vejdovský, 1882), the type species of the genus, is provided, and a new reference material is presented. The generic diagnosis is emended with details derived from the developmental trajectory of the valves, from the juvenile stage A-3 to the adult. Those criteria clearly differentiateTyphlocyprisfrom the related genusPseudocandonaKaufmann, 1900. As here redefined,Typhlocyprisis a phylogentic lineage of the subfamily Candoninae containing extant species presently living in aquatic subterranean habitats and fossil species recovered from non-marine Late Palaeogene to Neogene and Quaternary deposits in Europe and western Asia. The type species ofTyphlocyprisis considered a metaspecies, taxonomically treated asT. eremita(sensu lato), which includes populations resembling the newly designated reference material. The homeomorphic triangular valve shape of the Candoninae is discussed. Careful examination of the valve morphology ofTyphlocypriscombined with the analysis of limb traits helps to distinguish representatives of this genus from unrelated phylogenetic groups presenting similar triangularly shaped valves. It is emphasised that for a useful description ofTyphlocypristaxa both transmitted light and scanning electron microscopy are necessary.
authors.affiliation: University of Gdańsk, Faculty of Biology, Department of Genetics, Laboratory of Limnozoology, Wita Stwosza 59, PL-80-308 Gdańsk, Poland.
authors.forename: Tadeusz
authors.initials: T
authors.lastname: Namiotko
authors.affiliation: University of Graz, Institute for Earth Sciences (Geology & Palaeontology), Heinrichstrasse 26, A-8010 Graz, Austria.
authors.forename: Dan L
authors.initials: DL
authors.lastname: Danielopol
authors.affiliation: National Natural History Museum of Luxembourg, 25 rue Munster, L-2160 Luxembourg, Luxembourg.
authors.forename: Claude
authors.initials: C
authors.lastname: Meisch
authors.affiliation: Universalmuseum Joanneum, Department for Geology & Palaeontology, Weinzöttlstrasse 16, A-8045 Graz, Austria.
authors.forename: Martin
authors.initials: M
authors.lastname: Gross
authors.affiliation: National Institute of Biology, Večna pot 111, SI-1000 Ljubljana, Slovenia.
authors.forename: Nataša
authors.initials: N
authors.lastname: Mori