RESTUDY ON THE TRILOBITES (AGNOSTOIDS AND OTHER POLYMERIDS) FROM THE MIAOPO FORMATION (UPPER ORDOVICIAN) IN EASTERN YANGTZE GORGE AREA, WESTERN HUBEI
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Abstract:
species, belonging to 9 genera and 7 families, from the Upper Ordovician Miaopo Formation in Yichang and Zigui, western Hubei, are restudied on the basis of new materials. The preservation, deformation, depression and the morphological changes during ontogeny of species suggest to synonymize greatly the previously described species. Telephina longicephala seems to be a sexually dimorphic species. The first record of Atractopyge in the Miaopo Formation extended its range from the overlying Linxiang Formation down to the formation. Lonchodomas zhangi sp.nov. is named for the open nomenclature species Lonchodomas cf. yohi described by Zhang Tairong (1988) from the Taleji River Formation (Lower Ordovician) Guozigou, Xinjiang.
