也论Protaitzehoia Yang(三叶虫)的分类位置--再与袁金良、尹恭正商榷

根据新材料和对以往描述的种的模式材料的研究,认为Protaitzehoia的科级分类位置仍旧属德氏虫科(Damesellidae),将该属转移到鄂尔多斯虫科(Ordosiidae)是不正确的.以往所厘定的有些种可能不能成立.经归并Protaitzehoia目前只包括5种.

DISCUSSION ON THE TAXONOMIC POSITION AND SPECIES SYNONYMS OF PROTAITZEHOIA YANG-COMMENTS ON YUAN AND YIN, 2001: ON THE TAXONOMIC POSITION OF LATE CAMBRIAN PROTAITZEHOIA YANG

Yuan and Yin (2001) transferred Protaitzehoia from the family Damesellidae to the family Ordosiidae. Based on study of the new material from the Huaqiao Formation of western Hunan, and on examination of the type material of existing species, we conclude that the transfer made by Yuan and Yin is incorrect, and that the genus belongs certainly to the Damesellidae. Three new species (subspecies) erected by Yuan and Yin (2001), namely Protaitzehoia quadrata jimachongensis Yuan and Yin, Protaitzehoia nitida Yuan and Yin, and Protaitzehoia latilimbata Yuan and Yin, are from the same locality at Jimachong, Yuping, eastern Guizhou with the type material of Protaitzehoia granifera Yang , 1978. They are all proved to be junior synonyms of the latter species. In addition, two species from Wa'ergang, Taoyuan, northwestern Hunan, namely Protaitzehoia intermedia Peng, 1987, and Protaitzehoia sp. ( sensu Peng, 1978), are respectively junior synonyms of Protaitzehoia subquadrata Peng, 1987, and Protaitzehoia granifera Yang, 1978. Currently, Protaitzehoia includes only five species, i.e. Protaitzehoia yuepingensis Yang, 1978, the type species; P. granifera Yang, 1978; P. subquadrata Peng, 1987; P. quadrata (Resser and Endo,1937); and P. sp. sensu Peng, Babcock, and Lin, 2001.