峡东地区寒武纪三叶虫Palaeolenus的新材料  

NEW MATERIAL OF PALAEOLENUS (TRILOBITE, CAMBRIAN) FROM THE EASTERN YANGTZE GORGE AREA, WESTERN HUBEI

作　　者：林天瑞[1] 彭善池[2] 

机构地区：[1]南京大学地球科学系,南京210093 [2]中国科学院南京地质古生物研究所,南京210008

出　　处：《古生物学报》2004年第1期32-42,共11页Acta Palaeontologica Sinica

基　　金：国家自然科学基金 (Nos.40 0 2 3 0 0 2 ;40 0 72 0 0 3 );科技部基础工作专项基金 ( 2 0 0 1DEA2 0 0 2 2 0 );国家重点研究发展规划项目(G2 0 0 0 0 7770 0 );中国科学院项目 (K2CX2 SW 12 9)联合资助

摘　　要：对采自峡东地区宜昌、秭归等地的PalaeolenusMansuy ,1 91 2的新材料的形态、保存状态、挤压变形以及个体发育等方面的研究 ,提出MegapalaeolenusChang ,1 96 6的模式种PalaeolenusdepratiMansuy ,1 91 2是PalaeolenusMansuy的模式种PalaeolenusdouvilleiMansuy ,1 91 2的晚出异名 ,属名MegapalaeolenusChang和种名PalaeolenusdepratiMansuy均应予以废弃。文中还对原归于Palaeolenus和Megapalaeolenus的种作较大的归并和修订。Palaeolenidean material collected from the Shipai Formation at several localities in the eastern Yangtze Gorge Area, western Hubei can be assigned to two species of Palaeolenus, Palaeolenus douvillei Mansuy, 1912 and P. lantenoisi Mansuy, 1912. Study on the morphological variation, the postburial distortion in preservation, the ontogenetic changes in morphology of the new material, as well as other Chinese materials originally assigned to either Palaeolenus or Megapalaeolenus suggest conclusions as follows: 1. Palaeolenus deprati Mansuy 1912, the type species of Megapalaeolenus, and other 6 species original assigned to Megapalaeolenus, i.e. M. majiasha nensis Lin in Zhou et al. 1978, M. guizhouensis Yin in Yin and Li 1978, M. magnus Zhu in Zhang et al. 1980, M. granulatus Qian et Yao in Zhang et al. 1980, M. expanus Zhang et Zhu in Zhang et al. 1980, and M. luquanensis Luo in Luo et al. 1994, are junior synonyms of Palaeolenus douvillei. 2. Palaeolenus brevicus Xiang et Zhou 1987 is also a junior synonym of Palaeolenus douvillei. 3. Seven other palaeolenoid species namely Palaeolenus tingi Lu 1941, P. minor Lin in Zhou et al. 1978, P. planilimbatus Lin in Zhou et al. 1978, P. liantuoensis Xiang et Zhou 1987, P. yangziensis Xiang et Zhou 1987, Megapalaeolenus obsoletus Xiang et Zhou 1987, and Megapalaeolenus yichangensis Xiang et Zhou 1987 are all the junior synonyms of Palaeolenus lantenoisi. 4. Megapalaeolenus Chang, 1966 is a junior synonym of Palaeolenus Mansuy 1912. Gigoutella Hupé, 1953 is more likely also a junior synonym of Palaeolenus, but, as the monotype of its type species G. atlasensis seems to be lost, the status of the genus remains uncertain. Schistocephalus antiquus Chernysheva, as suggested by Rushton and Powell (1998) recently, should be transferred to Palaeolenus.

关 键 词：峡东地区 寒武纪 三叶虫 Palaeolenus 秭归 

分 类 号：Q915[天文地球—古生物学与地层学]