New Carboniferous and Permian cyclidans (Multicrustacea: Cyclida) from the Urals (Russia): the unpublished collection of B.I. Chernyshev at the CNIGR museum in St. Petersburg

Abstract We describe the findings of cyclidans from the unpublished collection of the famous paleontologist B.I. Chernyshev (1888–1950) in the storage of the Academician F.N. Chernyshev Central Scientific Research Geological Survey Museum (CNIGR museum, St. Petersburg, Russia). These cyclidans were discovered by various researchers in the Carboniferous and Permian of the Urals. They are represented by the following taxa: Oonocarcinus uralicus new species, Uralocyclus feldmanni new species, Ambocyclus capidulum (Chernyshev, 1933), and Magnitocyclus (?) sp. indet. The discovery of the new species Oonocarcinus uralicus n. sp. greatly expands the geographic and stratigraphic interval of the genus Oonocarcinus Gemmellaro, 1890, previously known from the Middle Permian and Triassic. The discovery of Uralocyclus feldmanni n. sp. in the Mississippian deposits of the Chelyabinsk Oblast indicates a wide distribution of the genus Uralocyclus Mychko and Alekseev, 2018 in the Early Carboniferous, because Carboniferous representatives of this genus were previously known only from Ireland and England. The paper provides an up-to-date list of all known cyclidan occurrences and taxa in Russia. http://zoobank.org/6d69be36-74ca-4205-8eb8-89d1f28458c7