Family Daphnidae

Ceriodaphnia cornuta Sars, 1888 . One of the common species, found in all types of localities except swamps, usually numerous. Planktonic. Species was described from Australia. C. rigaudi Richard, 1884, described from North Vietnam, is presumed to be a form of C. cornuta (Rzoska 1956; Kotov & Ferrari 2010) but future revision is needed. Taxon of unclear status, presumed to be pantropical, but most probably a species-complex. Molecular studies suggest that there are no sharing species from this complex in different continents (Sharma & Kotov, 2013).