Abstract

Systematic study of nine species of cyclostome bryozoan has been done from the Maastrichtian sediments of Kallankurichi Formation, Ariyalur Group, Cauvery Basin, South India. Among these Idmidronea sastreii n. sp. is new to science. Four species namely, Ybselosoecia sp., Spiropora sp., Tayloripora sp. and Exidmonea sp. are kept in open nomenclature and rests are already described from these deposits. These species are belonging to families Diaperoeciidae, Entalophoridae, Plagiociidae, Spiroridae, Stomatopridae and Tubuliporidae. These species are, Mecynoecia cf. virgula, Mesenteripora cf. corrugata, Proboscinopora cf. bassleri, and Exidmonea robusta.

Keywords: Bryozoa, Carbonate sediments, Cyclostome, Kallankurichi, Maastrichtian, South India