Large Branchio-pods (Crustacea: Anostraca, Notostraca, Laevicaudata, Spinicaudata) of the Samara oblast

For the first time, an annotated species list of the large branchiopod crustaceans (fairy shrimps, tadpole shrimps and clam shrimps) from the Samara Oblast is provided. Four of the eleven Branchiopoda species are reported from this region for the first time: Eubranchipus birostratus (Fischer, 1851), Chirocephalus josephinae (Grube, 1853), Eocyzicus orientalis Daday, 1914, Lepidurus arcticus (Pallas, 1793). The findings of L. arcticus, a species predominantly known from the circumpolar regions, are the southernmost in European Russia. All of the recorded species, as well as their habitats, are illustrated.