Pentacauliscus stellatus, Prokop & Slámová, 2012

Prokop, Rudolf J. & Slámová, Radana, 2012, New Species Of Crinoids Based On Their Columnals And Stem Fragments (Col.), From The Lower Devonian Zlíchov Limestone (Barrandian Area, The Czech Republic), Acta Musei Nationalis Pragae Series B 68 (3 - 4), pp. 133-138 : 133-134

Pentacauliscus stellatus sp. n. (col.).

Pl. 1, figs 1-6

1987 Pentacauliscus stellatus sp. n. (col): Slámová MS; p. 71, pl. VIII, figs 9-15.

H o l o t y p e: Isolated columnal NMP L 26627 figured by Slámová, 1987, pl. VIII, fig 10 and herein on Pl. 1, fig. 2.

T y p e h o r i z o n: “Chapel Horizon” at the base of the Zlíchov Limestone, Lower Devonian, Zlíchovian (= Lower Emsian).

T y p e l o c a l i t y: Abandoned quarry “U kapličky”, Praha-Zlíchov.

M a t e r i a l: In addition to the holotype and figured paratypes, there are more than 300 isolated columnals and stem fragments from weathered biosparitic limestones exposed at the type locality. A few specimens have been recently obtained from washings in the same “Chapel Horizon” exposed by an open cut into the active “Hvížďalka“ Quarry near Praha-Lochkov and also from the biomicrite Zlíchov Limestones with chert nodules exposed about one meter above the “Chapel Horizon” in the eastern part of “Červený lom” Quarry in Praha-Klukovice .

D e s c r i p t i o n: Stem heteromorphic, broadly pentastellate to pentagonal in outline, very variable in appearance. Noditaxis composed of relatively massive nodal (N) and three or four extremely thin internodals (1-4 IN). Nodals with narrow epifacet tapering interradially into bulky, pointed asymmetric extremities, internodals without epifacet. Facet plain, crenularium with fine crenellae, areola pentalobate to pentastellate, often reaching up to the facet margin. Lumen minute, pentalobate, cyclic spatium clearly visible.

Floripila MOORE et JEFFORDS, 1968 (col.)

Type species: Floripila florealis MOORE et JEFFORDS,

1968 (col.), Middle Devonian, New York, the USA.