New lower Triassic ammonoids from South Primorye

摘要

New ammonoid taxa of the families Aspenitidae (Aspenites radiatus sp. nov.), Hemilecanitidae (Deweveria kovalenkoi sp. nov.), Meekoceratidae (Subradioceras mikhailovichi gen. et sp. nov.), and Flemingitidae (Pseudoflemingites evolutus sp. nov., Rohillites orientalis sp. nov.) from the Smithian and Spathian substages of the Olenekian Stage of South Primorye are described. For the first time, data on the inner shell structure for the ammonoid subfamily Gyronitinae (based on the material of Subradioceras mikhailovichi gen. et sp. nov.) have been obtained.