Paleozoic Ptychocladia and related Foraminifera
Paleozoic Ptychocladia and related Foraminifera
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古生代披甲虫和相关有孔虫目
DOI：
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发表时间：
1950
期刊：
影响因子：
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通讯作者：
M. Elias
中科院分区：
文献类型：
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作者：
M. Elias
钙质壁的条状和肺泡状结构，室的分隔方式，以及发现的巨球孢子虫属（Ptycho- cladia），其微球孢子虫属以前被分类为栉虫属（ctenostoma- tbriyozoa），表明其属于附生有孔虫属。介绍了内布拉斯加州、堪萨斯州和俄克拉何马州宾夕法尼亚-希尔瓦尼亚地区的新变种小叶蝉和轮状叶蝉，以及巴斯利叶蝉新种。Chabakovia Vologdin是一种来自乌拉尔南部寒武纪中下时期的藻类，被认为与Ptychocladia有关，是已知最古老的有孔虫。另一种来自俄罗斯下二叠世的暂分类为Chabakovia (?) shulgae, n. sp.，并描述了另一种来自德克萨斯州下二叠世的Bdelloidina（?）二叠纪。所有提到的形式和现存的蛭形虫属合并为一个新的蛭形虫科。讨论了长尾虫的生活史，以及新科的进化和生态学。
Banded and alveolated structure of calcareous wall, manner of parti- tion of chamber, and discovered megalospheric generation for the genus Ptycho- cladia, whose microspheric generation was previously classified with ctenostoma- tous Bryozoa, indicate its belonging with adnate Foraminifera. New varieties P. agellus var. tenuis and var. rotaliformis, and new species P. bassleri from the Penn- sylvanian of Nebraska, Kansas and Oklahoma are described. Chabakovia Vologdin, a supposed alga from the Middle or Lower Cambrian of southern Urals, is considered related to Ptychocladia and the oldest known foraminifer. Another form from the Lower Permian of Russia is provisionally classified as Chabakovia (?) shulgae, n. sp., and another new species Bdelloidina (?) permica from the Lower Permian of Texas is described. All mentioned forms and the extant genus Bdelloidina are united in a new family Ptychocladiidae. The life-cycle of Ptychocladia, and the evolution and ecol- ogy of the new family are discussed.