Reussia regularis ( REUSS , 1865)

ZÁGORŠEK, KAMIL, 2010, BRYOZOA FROM THE LANGHIAN (MIOCENE) OF THE CZECH REPUBLIC PART II: SYSTEMATIC DESCRIPTION OF THE SUBORDER ASCOPHORA LEVINSEN, 1909 AND PALEOECOLOGICAL RECONSTRUCTION OF THE STUDIED PALEOENVIRONMENT, Acta Musei Nationalis Pragae Series B 66 (3 - 4), pp. 139-255 : 139-255

Reussia regularis ( REUSS, 1865)

Pl. 86, Fig. 1-5

v. * 1865 Eschara regularis m. – Reuss p. 185, Pl. 6, Fig. 13

1977 Reussia regularis ( REUSS, 1865) – Vávra p. 140 (cum syn.)

v. 2003 Reussia regularis ( REUSS, 1865) – Zágoršek p. 156, Pl. 21, Fig. 3 (cum syn.)

T y p e: Lectotype from Söllingen stored in the Natural History Museum Vienna under the number 1865.3.16 (not 1859.50.975 as stated by David and Pouyet, 1974).

M a t e r i a l: Altogether 8 specimens were studied from different localities. The species is probably more common, but when the ovicells are lacking, any determination remains uncertain. Two additional specimens (one of them labelled as Eschara hellerii ) from the Reuss collection and stored in the Natural History Museum Vienna under the number 1859.50.975 are from the section at Sedlec .

D i a g n o s i s: Colony large, erect, bilaminar with oval cross section. Autozooecia elongate and laterally perforated by about 10 to 16 large, circular marginal areolar pores. Frontal wall slightly convex. Aperture oval to circular with a short peristome. Avicularia oral, small, circular arrangement on the proximal margin of the aperture. Ovicell small, no pores on frontal wall visible.

R e m a r k s: The lateral walls in the type material are not prominent, the frontal wall is slightly convex. Eocene material shows prominent lateral walls, but this feature is missing in the studied material from the Miocene as well as in the specimen illustrated by Gordon ( Bock, 2010). Studied specimens do not show any pores on the ovicell, a fact which may however be caused by preservation .