英国早石炭世大网叶肢介科一新属  

A NEW CONCHOSTRACAN GENUS(LOXOMEGAGLYPTIDAE)FROM LOWER CARBONIFEROUS OF BRITAIN

作　　者：沈炎彬[1] 

机构地区：[1]中国科学院南京地质古生物研究所

出　　处：《古生物学报》1994年第2期156-164,267,共9页Acta Palaeontologica Sinica

摘　　要：描述了采自英国伯维克郡下石炭统水泥石群（社内阶）叶肢介一新局──Ｌｏｎｇｅｓｔｈｅｒｉａｇｅｎ．ｎｏｖ．。据壳瓣生长带上发育大网状纹饰构造，归属于Ｌｏｘｏｍｅｇａｇｌｙｐｔｉｄａｅ科，从而使该科的地质历程从晚二叠世，一直追溯到早石炭世早期。讨论了新属与该科其它属之间的形态特征联系。认为化石为原地埋藏，含叶肢介岩层属非海相沉积。The family Loxomegaglyptidae is characterized by an ornament of moderate to large polygonal reticulations (with mesh 0. 02--0. 2 in diameter) on the broad and flattened growth bands of the valve. The earliest representative of the family is Tshuvashium from the Upper Permian Tatalian stage of Tshuvash, Russia (Novojilov. 1958). More forms of the family are found in the Triassic, such as Loxomegaglypta (Novojilov, 1958), Diaplexa (Novojilov, 1954), Anyuanestheria and Shipingia (Zhang Wentang et al., 1976). Several genera belonging to this family from the Jurassic and Cretaceous were named Nestoria (Krasinetz, 1962), Paleoleptestheria (Novojilov, 1954) and Pseudoasmussia (Novojilov, 1954 ). The genus Paraleptestheria from the Eocene of China is so far known as the youngest member of the family (Chen Pei n, 1975: Chen Pei n and Shen Yanbin, 1 981). All the genera mentioned above are distributed in Eurasia.

关 键 词：早石炭世 叶肢 介新属 非海相沉积 

分 类 号：Q915.81[天文地球—古生物学与地层学]