Tylocidaris (Tylocidaris), 1883

Richard Pokorný, Jaroslav Kaše, Jiří Kvaček, Kamil Zágoršek, Kočí, Tomáš & Žítt, Jiří, 2012, Fossils In Late Cretaceous To Early Palaeocene Flint Nodules Embedded In Pleistocene Glaciofluvial Sediments Near Fukov (Děčín District, Northern Bohemia), Acta Musei Nationalis Pragae Series B 68 (3 - 4), pp. 119-131 : 123

Tylocidaris (Tylocidaris) sp.

Pl. 3, fig. 5

M a t e r i a l: 5 fragmentary spines, collection numbers FZP/P/12/2-3/010, FZP/P/12/2-3/011, FZP/P/12/2- 3/012, FZP/P/12/2-3/013, FZP/P/12/2-3/014.

D e s c r i p t i o n: The spines are stout, the shaft ornamented with coarse granules, adapically organized in rows. The neck not sharply demarcated from the shaft.

R e m a r k s: The spines resemble the species Tylocidaris (T.) sorigneti (DESOR, 1856) from the Lower Turonian (e.g., Bohemian Cretaceous Basin, see Žítt et al. 2006) or T. (T.) velifera ( AGASSIZ et DESOR, 1846) from the Lower Cenomanian of England ( Smith and Wright 1989) and T. (T.) bruennichi RAVN, 1928 and T. (T.) abildgaardi RAVN, 1928 from the Danian of Denmark and the Netherlands ( Ravn 1928; Jagt 1999, 2000) (the last two species have been used as zonal markers in the Danian type area by Brotzen (1959)). Another similar species, T. (T.) vexillifera SCHLÜTER, 1892, is also known from the Danian of the NW Europe and its spines were found even in flints of glacial deposits from northern Germany ( Schlüter, 1892). However, the spines of this species have small wings or depressions distally which are absent in the recently studied material. A reliable conspecification of our material with any of the above mentioned species is not possible due to its unfavourable preservation.