吉林省中部早石炭世杜内期的腕足动物化石

描述的化石是采自吉林省中部杜内期北通气沟组,共17个属24个种,包括3个新种。这个动物群的特点与我国南方杜内期动物群的特点不同,而与美国密西西比系金德胡克组、苏联库茨纳兹盆地和莫斯科盆地杜内期的动物群非常相像。类似的动物群在新疆、甘肃和内蒙等省和自治区均已发现。吉中地区杜内期腕足动物群,属于北美—西伯利亚古生物地理区系。

TOURNAISIAN BRACHIOPOD FOSSILS FROM CENTRAL JILIN PROVINCE

The fossils described were collected from Beitongqigou Formation of Tourn-aisian in central Jilin Province. 17 genera and 24 species are included with 3 species being new. They are. Schizophoria chouteauensis,Rhipidomella sp., Schuchertella spp., Plicochonetes spp., Marginatia spp., Scutepustula sp., Eumetria verneultiana, Retzia jilinensis sp. n. ,Cyrtospirifer sp.,Tylothyris cf, Iransversa, T. subcircul aris sp. n.,Syringothyris cf. halli, S. cf. hannibaiensis, Fusella osipovensis, F. louisianensis, F .biplicatus, F. jizhongensis sp. n., Brachythyris chouteauensis, B. pecularis, B. sp.,Punctospirifer sp., Nebenothyris sp.,Camarotoechia biplex,etc..The character of this fauna is different from the tournaisian brachiopod fauna of South China but closely resembles to that from Kinderhookian of Mississippian in U. S. A. and Tournaisian fauna from Kyznetsk and Moscow Basins in USSR. Similar faunas were found in Xingjiang Aut. Reg. and Gansu Province as well as in Inner Mongolia..The important species in this fauna such as Eumeiria verneuiliana Syringoth-yris halli, S. hannibalensis, Fusella biplicatus, F. louisianensis, Brachythyris chouteauensis, B. pecularis and Ccmarotoechia 6iplex etc.,are common members in Kinderhookian of Mississippian in U. S. A. and Tournaisian in USSR, this indicates that this fauna belongs to North American-Siberian Palaeobiogeographic Province.