| 宜昌地区早志留世（Llandoverian）腕足类一新科Spinochonetidae (fam. nov.)及其意义 |
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| 引用本文： | 曾庆銮,张淼,李志宏.宜昌地区早志留世（Llandoverian）腕足类一新科Spinochonetidae (fam. nov.)及其意义[J].地质学报,2015,89(4):681-691. |
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| 作者姓名： | 曾庆銮 张淼 李志宏 |
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| 作者单位： | 中国地质调查局武汉地质调查中心,武汉,430223 |
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| 基金项目： | 中国地质调查局项目(编号201311062;1212011120143)资助的成果 |
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| 摘 要： | 腕足类新科Spinochonetidae(fam.nov.)建立在宜昌地区志留系兰多维列统罗惹坪组下段中部(上埃隆阶)的Spinochonetes Rong,Xu et Yang(1974)和Spinolella(gen.nov.)两个属,以及一个属、种未定的分类单元的基础上。新科成员仅有从腹壳喙部伸出一根直的腹喙刺,这与Chonetoidea超科内的Strophochonetidae科以及Chonestrophiidae科众成员的铰合缘刺都是从腹壳铰合缘上伸出来的有着本质差别。另外,本文还对Spinochonetes以及它的属型种S.notata Rong,Xu et Yang(1974)进行重要图解和补充描述。与此同时,对Spinolella(gen.nov),以及S.minuta(gen.et sp.nov.)进行系统描述和对比。据目前所知,新科成员只分布于我国鄂西、黔东北、陕南和川北等地,属于上扬子台地的土族居民。因为Spinochonetidae(fam.nov.)属于腕足类独特的一个类型,演化快,贝体极小,保存精美,因此具有分类学、地层对比,以及恢复古环境等方面的重要意义。
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| 关 键 词： | 腕足类 新科和新属 早志留世(Llandoverian) 上扬子台地 宜昌地区 |
| 收稿时间： | 2013/9/18 0:00:00 |
| 修稿时间： | 2014/5/23 0:00:00 |
A New Brachiopod Family Spinochonetidae from the Llandovery (Silurian) in Yichang,Western Hubei,Central China and Its Significance |
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| ZENG Qingluan,ZHANG Miao and Li Zhihong.A New Brachiopod Family Spinochonetidae from the Llandovery (Silurian) in Yichang,Western Hubei,Central China and Its Significance[J].Acta Geologica Sinica,2015,89(4):681-691. |
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| Authors: | ZENG Qingluan ZHANG Miao and Li Zhihong |
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| Institution: | Wuhan Center of China Geological Survey, Wuhan, Hubei, 430223;Wuhan Center of China Geological Survey, Wuhan, Hubei, 430223;Wuhan Center of China Geological Survey, Wuhan, Hubei, 430223 |
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| Abstract: | A new specific family Spinochonetidae of brachiopods is based on Spinochonetes Rong, Xu et Yang, Spinolella (gen. nov.) and gen. et sp. indet. from the Middle part (Upper Aeronian) of the Lower Member of the Luoreping Formantion in Yichang Aera Western Hubei, Central China (Text table 1), The all members of Spinochonetidae (fam. nov.), only one orthomorph ventral beak spine originating from ventral beak, whereas hinge spines of family Strophochonetidae and family Chonestrophiidae all originating from on posterior ventral hinge margin, therefore they have an essential distinction. In addition, the genus Spinochonetes and its type species S. notata are significant complementally illustrated and described. At the same time, Spinolella (gen. nov.) and its type species S. minuta (gen. et sp. nov.) are described and compared. Up till the present know, the population of new family Spinochonetidae only distributed in Western Hubei, Northeastern Guizhou, Southern Shanxi and Northern Sichuan, South China, and therefor they belong in the local nationality of the Upper Yangtze Platform Region, Southern China.
Because Spinochonetidae (fam. nov.) is a specific type of the brachiopos, it is quick-evolution, shell very small and well-preserved. Therefore, the members of new family Spinochonetidae possess the great importances for systematic study, restoring paleoenvironment and stratigraphic correlation of the Llandoverian strata of the Silurian. |
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| Keywords: | Brachiopoda new family and new genus Llandoverian Silurian importance Upper Yangtze Platform Yicahng Area |
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