New dinoflagellate cyst genera from the recent sediments of the Persian Gulf

摘要

Five species ofPeridinium-type dinoflagellate cysts are described from sediment samples from the Persian Gulf and the Northern Arabian Sea. A dual classification system, as outlined by Reid (1974) and Sarjeant and Downie (1974), has been followed. These cysts are assignable, using cyst nomenclature, to four new genera:Stelladiniumnov.;Leipokatiumnov.;Multispinulanov.; andOmanodiniumnov. The five new species areS. reidiisp. nov.;L. invisitatumsp. nov.;M. quantasp. nov.;O. alticinctumsp. nov.; andO. tholussp. nov. All genera have been attributed to the family Phthanoperidiniaceae Drugg and Loeblich, 1967 emend. nov.