论泥盆纪腕足动物Yunnanella和Nayunnella属  

STUDY OF THE DEVONIAN BRACHIOPOD GENERA YUNNANELLA AND NAYUNNELLA

作　　者：陈秀琴[1] 廖卓庭[1] 许汉奎[1] 

机构地区：[1]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》2001年第2期229-238,共10页Acta Palaeontologica Sinica

基　　金：国家自然科学基金! ( 4 9972 0 0 5 );国家重点基础研究发展规划项目! (G2 0 0 0 0 7770 0 )资助

摘　　要：腕足动物Yunnanella和Nayunnella两属在我国分布很广 ,是晚泥盆世法门期重要的带化石之一。由于命名等问题 ,迄今 ,这两属的使用在国内外仍比较混乱。Sartenaer (196 1a ,196 2 )根据国际动物命名法规提出 ,YunnanellaGrabau ,192 3和NayunnellaSartenaer ,196 1两属的命名是有效的 ,它们的模式种分别是Yunnanellahanburii (Davidson ,185 3)和YunnanellasynplicataGrabau ,1931。YunnanellaGrabau ,1931是YunnanellaGrabau ,192 3的异物同名 ,YunnanellinaGrabau ,1931是YunnanellaGrabau ,192 3的同物异名。研究认为 ,Sartenaer(196 1a ,196 2 )的观点符合国际动物命名法规的优先原则 。The Devonian brachiopod Yunnanella-Nanyunnella fauna is widely distributed in China, especially in South China. Since 1923, this fauna has been recorded in China by many authors (Grabau, 1923-1924, 1931; Schuchert et al., 1929; Tien, 1938; Wang, 1955; Wang et al., 1964, 1966; Zhang et al., 1959; Yang et al., 1977; Xu et al., 1978; Xu, 1978, 1979, 1980 ; Wang et al., 1982; Zhang et al., 1983; Zhang et al., 1983; Wang, 1984; Yang,1984; Yu et al., 1990; Ma, 1995). 　　The genus Yunnanella was first reported by Grabau with two species Yunnanella synplicata Grabau and Y. hanburii (Davidson) (Grabau,1923, p.191,195). However, the monography on Devonian brachiopods of China written by Grabau was not published until 1931. In which, Grabau described Yunnanella as a new genus with a new species Yunnanella synplicata Grabau, 1931 as its type species and a new subgenus Yunnanellina with Rhynchonella hanburii Davidson,1853 as its type species (Grabau,1931, p.141,157). In two papers dealing with nomenclatural problems, Sartenaer (1961a, 1962) remarked that the nominal genus Yunnanella has been valid since 1923 when it was erected by Grabau and contained only one valid species Rhynchonella hanburii Davidson which was described by Davidson in 1853. The species Yunnanella synplicata Grabau, has neither description nor illustration in Grabau's book in 1923 and was not valid until 1931. Thus Y. hanburii had become an objective type species of Yunnanella although Grabau did not indicate the type species of Yunnanella in 1923. The subgenus Yunnanellina Grabau，1931 is objectively a synonym of Yunnanella Grabau，1923 because they have the same type species. 　　Taken Yunnanella synplicata Grabau as the type species, Sartenaer (1961a) proposed a new genus Nayunnella as a substitute for the genus Yunnanella Grabau,1931. The genus Nayunnella differs from Yunnanella Grabau, 1923 in having costellae extending into plications arisen dependently near anterior and has been widely accepted since 1961.　　In the past decades, Yunannella

关 键 词：Yunnanella属 Yunnanellina属 Nayunnella属 命名 腕足动物 晚泥盆世 

分 类 号：Q915.816[天文地球—古生物学与地层学]