20- Cypridopsis vidua (O.F. M̧ller, 1776)

Global distribution: AT, AU, NA, NT, OL, PA, PAC.

Argentinian distribution: Buenos Aires, Corrientes, Formosa, La Pampa, Mendoza, Río Negro, Tucumán.

Ecology: This very common and cosmopolitan species was observed in all types of environments, from lentic to lotic, temporary to permanent and in phytotelmata. It was found in a wide range of altitudes (20–1330 m a.s.l.), with electrical conductivity values ranging between 112 and 7090 μS/cm and dissolved oxygen values ranging from 0.2 to 3.8 mg /l.

Cited by: Wierzejski (1893); Ramirez (1967); Martens & Behen (1994); Moguilevsky & Whatley (1995); Cusminsky & Whatley (1996); Cesar et al. (2001); Laprida (2006); Díaz (2009); Liberto et al. (2012); Kihn & Pall (2013); Kihn & Gomez (2015); Crespo (2017); D'Ambrosio et al. (2017); Kihn et al. (2017); Coviaga et al. (2018a).