Escharella tenera ( REUSS , 1874)

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

Escharella tenera ( REUSS, 1874)

Pl. 89, Fig. 1-6

v. * 1874 Lepralia tenera m. – Reuss p. 167, Pl. 2, Fig. 4

1974 Escharella tenera ( REUSS, 1874) – David and Pouyet p. 187, Pl. 9, Fig. 6 (cum syn.)

1977 Escharella tenera ( REUSS, 1874) – Vávra p. 137 (cum syn.)

T y p e: Lectotype from Eisenstadt deposited in the Natural History Museum Vienna under the number 1878. 11.58 ( David and Pouyet, 1974)

M a t e r i a l: Altogether 22 specimens were studied, from almost all the studied sections.

D i a g n o s i s: Colony encrusting, autozooecia oval to hexagonal with a smooth, slightly convex, frontal wall. Marginal areolar pores large, about 30 pores are arranged on the border of each autozooecium. Aperture oval to semilunar with 3-5 oral spines, sometimes not visible and with a short peristome (calcified lip). Lyrula large and rectangular. Ovicell deeply immersed into the distal part of the autozooecium; it has a smooth, slightly granular frontal wall. In ovicelled autozooecia the lateral lips of the orifice overlap the margin of the ovicell.

R e m a r k s: Oral spines on the studied specimens are sometimes not visible which may be due to preservation. Similar features are also shown by the type material stored in the Natural History Museum Vienna. The type has a less convex frontal wall, but the other characteristics, especially the shape and position of ovicell, are identical .