(6) Cypris pubera O.F. Müller, 1776

Daday (1892, 1900) described the following five varieties of Cypris pubera, mainly in relation to the presence/absence and development of posteroventral marginal spines of the right valve: anacantha (absence of spines), monacantha (one single spine), diacantha (two spines), triacantha (three spines) and polyacantha (more than three spines). We consider these varieties – which were not retained in any of the subsequent faunistic synopses (e.g., G.W. Müller 1912; Klie 1938 a; Farkas 1958; Henderson 1990; Meisch 2000) – to express the morphological variability of the species and they are therefore listed here as synonyms of the main form. Daday (1900) does not mention the variety triaculeata of C. pubera, which he had described eight years earlier (Daday 1892). The latter variety was raised to species rank by Fuhrmann & Pietrzeniuk (1990), mainly based on the difference in the posteroventral spines of the right valve. However, we here consider triarticulata to rank within the variability range of Cypris pubera, a variation that is indeed to be expected in a species that reproduces almost entirely parthenogenetically (males of C. pubera are so far only known from one site in Turkey; Schäfer 1952). Cypris triaculeata sensu Fuhrmann & Pietrzeniuk 1990 is therefore listed as a synonym of Cypris pubera .