Uncovering the hidden diversity of Mississippian crinoids (Crinoidea, Echinodermata) from Poland

PeerJ

article

Mariusz A. Salamon¹  William I. Ausich²  Tomasz Brachaniec¹  Bartosz J. Płachno³  Przemysław Gorzelak⁴ 

[1] Faculty of Natural Sciences, Institute of Earth Sciences, University of Silesia in Katowice;School of Earth Sciences, Ohio State University;Faculty of Biology, Institute of Botany, Jagiellonian University in Kraków;Institute of Paleobiology, Polish Academy of Sciences

关键词: Crinoidea;    Echinodermata;    Taxonomy;    Biogeography;    Carboniferous;   

DOI  :  10.7717/peerj.10641

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

Partial crinoid crowns and aboral cups are reported from the Mississippian of Poland for the first time. Most specimens are partially disarticulated or isolated plates, which prevent identification to genus and species, but regardless these remains indicate a rich diversity of Mississippian crinoids in Poland during the Mississippian, especially during the late Viséan. Lanecrinus? sp. is described from the late Tournaisian of the Dębnik Anticline region. A high crinoid biodiversity occurred during late Viséan of the Holy Cross Mountains, including the camerate crinoids Gilbertsocrinus? sp., Platycrinitidae Indeterminate; one flexible crinoid; and numerous eucladid crinoids, including Cyathocrinites mammillaris (Phillips), three taxa represented by partial cups left in open nomenclature, and numerous additional taxa known only from isolated radial plates, brachial plates, and columnals. To date, the youngest occurrence of Gilbertsocrinus was the early Viséan of the United States, thus the present finding in upper Viséan extends this genus range. Furthermore, the occurrence of Lanecrinus? sp. expands the Western European range of this genus into the Tournaisian. A single partially disarticulated crown, Crinoidea Indeterminate B, is described from the Serpukhovian of the Upper Silesian Coal Basin. In addition, several echinoid test plates and spines are also reported.

【 授权许可】

CC BY