Výzkum ostnokožců z nové lokality "bílých vrstev" v koněpruských vápencích ve Velkolomu Čertovy schody-západ (spodní devon, prag)

Publication Type:Journal Article
Year of Publication:2012
Authors:Prokop, RJ, Turek, V
Journal:Zprávy o geologických výzkumech v roce 2011/C - Paleontologie
Start Page:144
Pagination:2
Type of Article:© Česká geologická služba, 2006. http://www.geology.cz/zpravy/obsah/2011
ISSN:0514-8057
Keywords:Barrandian Area, Czech Republic, Echinodermata, Koněprusy Limestone, Lower Devonian, palaeobiology, palaeoecology, Pragian
Abstract:

Systematic research of the Lower Devonian reef complex near Koněprusy conducted last year has continued with the investigation of echinoderms from weathered parts of the Koněprusy Limestone, which was recently exposed in the west face of the Velkolom Čertovy schody-West quarry. Washings from this newly discovered locality yielded many echinodermal skeletal remains, mostly columnals and stem fragments of crinoids. Until present there were determined 27 genera assigned to 34 species of crinoids. Representatives of the genera Salairocrinus, Poteriocrinites and Asperocrinus are most common. Except crinoids, only very few remains of other groups of echinoderms have been discovered in washings: central plate of Stenaster (Asteroidea) and one thecal platelet and one jaw demipyramide of Lepidocentrus (Echinoidea). The studied locality represents the detrital talus of the inner part of the reef's peripheral zone marked with dense crinoid growth. Massive skeletal remains of crinoids that lived in the reef mass, e.g. Pernerocrinus, Torrocrinus and Vadarocrinus are missing; skeletal parts of Trybliocrinus are very rare. Compared with crinoidal fauna from other localities in the Koněprusy Limestone, this palaeocommunity is less diverse in all taxonomical levels.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith