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New data on crinoid assemblages from the oldest sedimentary rocks of the Polish Outer Carpathians (Jurassic-Cretaceous)
Annales de Paléontologie ( IF 1.0 ) Pub Date : 2019-06-29 , DOI: 10.1016/j.annpal.2019.05.007
Mariusz A. Salamon , Bruno Ferré , Andrzej Szydło , Tomasz Brachaniec , Miroslav Bubík

Crinoids (Crinoidea) preserved in the so-called Cieszyn Beds (Tithonian-Hauterivian; southern Poland) are relatively numerous, especially in some levels, but not highly diversified. They are absent in the Lower Cieszyn Shale (Tithonian) and the Upper Cieszyn Shale (Valanginian-Hauterivian). The Lower Cieszyn Limestone (Tithonian) yielded crinoid remains classified as Isocrinus cf. amblyscalaris (Thurmann) and Isocrinida indet. In the Upper Cieszyn Limestone (Berriasian) crinoids are much more numerous and diversified. The following taxa are recorded: Isocrinus? annulatus (Roemer), Balanocrinus subteres (Münster), B. cf. smithi Hess and Gale, and Hemicrinus sp. The presence of specimens resembling Isocrinus amblyscalaris (Thurmann) in the Tithonian strata is surprising since the last occurrence of this taxon was reported from the Kimmeridgian. The Lower Cieszyn Limestone crinoidal assemblage is dominated by isocrinids (Isocrinida). This probably reflects the much shallower sedimentary environment of these sediments compared to that of the Upper Cieszyn Limestone, where excepting isocrinids, hemicrinids (Hemicrinidae, Cyrtocrinida) typical for deep marine environments were found. It is consistent with the analytical results from the foraminiferal assemblages, among which the benthic forms known from shelfal and paralic epicontinental environments first dominated, and then were supplanted by deep-sea taxa at the turn of the Jurassic and Cretaceous.



中文翻译:

来自波兰喀尔巴阡山脉(侏罗纪-白垩纪)最古老沉积岩的海百合类组合的新数据

所谓的Cieszyn床(Tithonian-Hauterivian;波兰南部)中保存的海百合(Crinoidea)相对较多,特别是在某些层次上,但并不是高度多样化。在下切斯钦页岩(提通纪)和上切斯钦页岩(瓦朗吉尼-上特里夫期)中不存在它们。该下切申石灰石(提通阶)产生列为海百合遗体Isocrinus比照 amblyscalaris(Thurmann)和Isocrinida独立。在上部切申(Cieszyn)石灰岩中(贝里亚斯),海百合的数量众多且种类繁多。记录了以下分类单元:Isocrinusn(Roemer),Bal龟(Münster),B。cf. smithi Hess和Gale,以及Hemicrinus  sp。标本的存在类似于淡水伊斯卡里纳斯自从Kimmeridgian报道了该分类单元的最后一次出现以来,Tithonian地层的(Thurmann)令人惊讶。下切斯zyn石灰石的海百合状组合主要由异旋虫(Isocrinida)组成。与上切西恩石灰岩相比,这可能反映了这些沉积物的沉积环境要浅得多,在上切森石灰岩中,除了异种rin,半藻类(半mic科,Cyrtocrinida)以外,还发现了深海环境的典型沉积物。这与有孔虫组合的分析结果是一致的,其中以陆架和副陆上陆环境已知的底栖形式首先占主导地位,然后在侏罗纪和白垩纪时期被深海类群取代。

更新日期:2019-06-29
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