A NEW ORDOVICIAN TRILOBITE OVALOCEPHALUS EOPRIMITIVUS SP. NOV. FROM THE DAWAN FORMATION,YICHANG,WESTERN HUBEI
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Abstract:
The trilobite genus Ovalocephalus Koroleva,1959 (=Hammatocnemis Kielan,1960) has long been considered to be biogeographically significant. It was endemic to peri-Gondwana and especially widely spread in China during the Ordovician (Lu and Zhou,1979; Zhou and Dean,1989). Its earliest species previously known is Ovalocephalus primitivus (Lu) with the holotype cranidium (Lu,1975,pl. 45,fig. 7) recorded from the upper Dawan Formation (early Darriwilian) of the Yichang area. Recently,some new material of the gen...
