New species of crinoids based on their columnals and stem fragments (col.), from the Lower Devonian Zlíchov Limestone (Barrandian area, Czech Republic)

Publication Type:Journal Article
Year of Publication:2012
Authors:R. J. Prokop, Slámová R.
Journal:Acta Musei Nationalis Pragae/Series B – Historia Naturalis
Start Page:133
Type of Article:
Keywords:Barrandian Area, columnals and stem fragments, Crinoidea, Floripila, Koněprusy Limestone, Lower Devonian, Lower Emsian, Mediocrinus, new species (col.), Pentacauliscus, Pragian, Salairocrinus, systematics, Zlíchov Limestone, Zlíchovian

The washings from the weathered biosparitic limestones of the “Chapel Horizon” at the base of Zlíchov Limestone (Lower Emsian) in the Barrandian area yielded among others a bulk of isolated skeletal remains of crinoids. These remains consisted of columnals and stem fragments of genera and species to date unknown in the Lower Devonian of Bohemia. Four new taxa from the remains are described in the present study: Pentacauliscus stellatus sp. n. (col.), Floripila formosa sp. n. (col.), Salairocrinus apertus sp. n. (col.) and Mediocrinus stukalinae sp. n. (col.). The columnals and stem fragments of species very similar to the species here described were also obtained from the washings of weathered sparitic bioclastic Koněprusy Limestone of Pragian age which is exposed both in the “Čertovy schody – West” Quarry near Koněprusy and “Čertovy schody – East” Quarry near Suchomasty.

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