Shell structure of helically coiled microconchids from the Middle Triassic (Anisian) of Germany
Shell structure of helically coiled microconchids from the Middle Triassic (Anisian) of Germany
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DOI：
10.1007/s12542-010-0064-y
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发表时间：
2010-05
期刊：
影响因子：
--
通讯作者：
O. Vinn
中科院分区：
文献类型：
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作者：
O. Vinn
德国南部Anisian早期的变形微贝壳（Microconchus aberrans，Hohenstein，1913）螺旋盘管的微贝壳亲和性得到了贝壳结构扫描电镜研究的支持。在变态分枝杆菌的壳中可能有假刺。螺旋盘绕和一些基板胶结的平面螺形微贝壳在三叠纪具有类似的微片层管结构。形态异常的M.aberransis的结构是古生代至中三叠世微贝壳的特征。M.aberransin Wellenkalk的外来管碎片可能起源于微贝壳生物层。
Microconchid affinity of helically coiled tubes ofMicroconchus aberrans(Hohenstein, 1913) from the early Anisian of southern Germany is supported by an SEM study of shell structure. There are probable pseudopunctae in the shell ofM. aberrans. Helically coiled and some substrate-cemented planispiral microconchids have similar microlamellar tube structures in the Triassic. The structure of the morphologically aberrantM. aberransis characteristic of Palaeozoic to Middle Triassic microconchids. Allochthonous tube fragments ofM. aberransin the Wellenkalk presumably originate from a microconchid biostrome.