Atractides diastema Szalay, 1935

Smit, Harry, Gerecke, Reinhard, Pešić, Vladimir & Gledhill, Terence, 2015, On the taxonomic state of water mite taxa (Acari: Hydrachnidia) described from the Palaearctic, part 3, Hygrobatoidea and Arrenuroidea with new faunistic data, Zootaxa 3981 (4), pp. 542-552 : 544

Atractides diastema Szalay, 1935

Species incerta. Since the first description from a female collected in a stream in Hungary, this species has been recorded only once again in Poland ( Biesiadka 1973) and the male remained unknown until the present-day. Biesiadka (1973) correctly refused the proposal of Besseling (1954) to synonymize A. diastema with A. distans K. Viets, 1914 ( Gerecke 2003) . However, the attribution of the specimens from Poland remains unclear, both due to morphological differences as compared with the original description, and due to insufficient information on some character states in the latter. In many cases, species described from females cannot be recognized with certainty; as in many genera, males bear more characters suitable for species definition. As the type specimen of A. diastema is lost, a well-founded diagnosis is not possible and it must be considered a species incerta.