Carinatina NALIVKIN , 1930

Mergl, Michal & Budil, Petr, 2019, Rhynchonelliform Brachiopods And Trilobites Of The ‘ Upper Dark Interval’ In The Koněprusy Area Devonian, Eifelian, Kačák Event; The Czech Republic, Fossil Imprint 75 (1), pp. 92-107 : 98

Genus Carinatina NALIVKIN, 1930

T y p e s p e c i e s. Orthis arimaspus EICHWALD in VON

BUCH, 1840; Middle Devonia; Russia.

Carinatina arimaspus (EICHWALD in VON BUCH, 1840) Pl. 2, Figs 8, 9, 14

1840 Orthis Arimaspus EICHW. ; von Buch, pp. 108, 112.

1975 Carinatina arimaspus (EICHWALD, 1840) ; Rzhonsnitskaya, p. 139, text-fig. 45, pl. 31, figs 1–3, 12.

1978 Carinatina arimaspus (EICHWALD, in Buch 1840); Copper, p. 310, pl. 7, figs 1–6.

1987 Carinatina arimaspus (EICHWALD, 1840) ; Havlíček, p. 93, pl. 11, figs 7–9.

1990 Carinatina arimaspus (EICHWALD, 1840) ; Havlíček and Kukal, pp. 165, 166, pl. 17, fig. 9, pl. 23, fig. 4.

M a t e r i a l. Three incomplete ventral valves (PCZCU

2279, PCZCU 2280, PCZCU 2293).

D e s c r i p t i o n. The ventral valve is carinate, moderate thick walled and bears laterally curved rounded coarse costae. New costae originate by both bifurcation and intercalation. The shell surface is covered by faint concentric growth fila at regular, ca. 0.3 mm, intervals (Pl. 2, Fig. 14). The secondary shell layer is distinctly fibrous.

R e m a r k s. Although strongly fragmented and poorly preserved, the size, moderately thick shell, form of radial ornamentation and carinate ventral valve justify assignment of these valves to Carinatina arimaspus (EICHWALD in VON BUCH, 1840). Although rare, this species is present in the Acanthopyge Limestone ( Havlíček and Kukal 1990), and a similar mode of preservation indicates that fragments from the UDI likely belong to this geographically widespread and phenotypically variable species from the Emsian ( Khodalevich et al. 1959, Halamski and Baliński 2013).

O c c u r r e n c e. UDI, sample TM 10, TM 12.