摘要
小嘴贝亚门顾脱贝科顾脱贝属(Kutorgina Billings,1861)属于碳酸钙质壳非铰合类腕足动物,于1861年建立,含20个种,最早出现于传统的早寒武世,绝灭于中寒武世中期,广泛分布于北美洲及亚洲。贵州剑河八郎"清虚洞组"产顾脱贝两个种:犰狳顾脱贝(相似种)(K.cf.cingulata)及松山顾脱贝(新种)(K.songshanensis sp.nov.)。K.cf.cingulata与北格陵兰的K.cingulata在轮廓、壳饰上相似,主要区别是后者个体略大,少数背壳标本可见中隆;K.songshanensis sp.nov.具有与其他顾脱贝明显不同的特点——同心层稀少并常见三条同心层。"清虚洞组"顾脱贝的发现及研究,不仅与凯里组的顾脱贝形成演化链,而且为研究全球顾脱贝的演化及早寒武世腕足动物的辐射和多样性增添了新材料。
The brachiopod genus Kutorgina Billings, 1861 contains 20 species and has a range of Early to mid-Middle Cambrian. It is widely distributed in North America and Asia. Two species, K. cf. cingulata and K. songshanensis sp. nov., were recovered from the ＂Tsinghsutung Formation＂ at Jianhe County, Guizhou. K. cf. cingulata is similar to K. cingulata from central North Greenland in outline and ornamentation, but differs from the latter by being slightly larger and by lacking a dorsal median fold. K. songshanensis sp. nov. distinctly differs from other species of Kutorgina in having less well developed concentric lamellae. The discovery of Kutorgina from the ＂Tsinghsutung Formation＂ establishes an evolutionary link with species of the genus from the Kaili Formation and also provides additional evolutionary insights about the genus and Lower Cambrian brachiopods more generally.
出处
《古生物学报》
CAS
CSCD
北大核心
2015年第3期342-350,共9页
Acta Palaeontologica Sinica
基金
国家重点基础研究发展规划项目(973)(2013CB835002
2015FY310100)
贵州大学研究生创新基金(研理工2015061)
贵州省古生物研究中心建设基金(黔科合Z字[2014]4003号)
国家重点自然科学基金(41330101)
国家自然科学基金(41172005)联合资助
关键词
顾脱贝
腕足动物
“清虚洞组”
寒武系
剑河
贵州
Kutorgina, brachiopods, ＂Tsinghsutung Formation＂, Cambrian, Jianhe, Guizhou Province
