On the taxonomy of water mites (Acari: Hydrachnidia) described from the Palaearctic, part 1: Hydrachnidae, Limnocharidae and Eylaidae Author Davids, Kees Author Sabatino, Antonio Di Author Gerecke, Reinhard Author Gledhill, Terence Author Smit, Harry text Zootaxa 2005 1061 36 64 journal article 50862 10.5281/zenodo.170186 d91ae7dd-a600-4f24-a890-7201060d61b6 1175­5326 170186 Hydrachna cruenta Müller, 1776 Hydrachna schneideri Koenike, 1895 : synonymy first proposed by K. Viets (1935) ­ here confirmed. Material examined: Hydrachna cruenta male SMNH 6043, Östergötland, Källstad socken 13.6.1913 Lundblad; female SMNH 752 Södermanland, Björnhuda, 5.7.1923 Lundblad; Hydrachna schneideri lectotype male, SMNH 375 Heiligenrode, 2370 Ostfriesland. Discussion: Notwithstanding the lack of type material of H. cruenta , it is generally accepted that the male syntype of H. schneideri Koenike, 1895 is identical to that species. As this specimen must be considered the lectotype of H. schneideri , this name is obviously unavailable in taxonomic nomenclature and the valid name for all specimens published under the name of H. schneideri is H. skorikowi ( Piersig, 1900 ) (see under this name for a detailed discussion).