Poricella areolata ( 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

Poricella areolata ( REUSS, 1874)

Pl. 75, Fig. 1-3

* 1874 v. 1974

1977

1977 Lepralia areolata m. – Reuss p. 156, Pl. 4, Fig. 9-10 Tremogasterina areolata ( REUSS, 1874) – David and Pouyet p. 112, Pl. 6, Fig. 7

Tremogasterina areolata ( REUSS, 1874) – Cook p. 128, Fig. 6

Tremogasterina areolata ( REUSS, 1874) – Vávra p. 85

T y p e: Lectotypes (two specimens) established by David and Pouyet (1974) deposited in the Natural History Museum Vienna under the collection of Karrer. Cook (1977) refers that she studied type, but she did not give any details (number of specimens etc.). So it is not clear, if these specimens are the original Reuss specimens or not.

M a t e r i a l: More than ten specimens only from the section Přemyslovice.

D i a g n o s i s: Colony encrusting. Autozooecia oval, slightly elongated separated by deep grooves with rounded, prominently convex frontal wall. Marginal areolar pores are large, circular usually more than 20 around each autozooecium. Aperture elongated, with very wide sinus, cleithridiate. Condyles prominent. Oral spines present, usually four bases around aperture. A small proximal mucro situated in some autozooecia on frontal wall. One to four frontal foramina, semilunar to crescent-shaped present. The outer, convex margin of foramina may have small dentitions, the inner margin usually carries one large condyle. Rostra of interzooidal avicularia enlarged, rounded, occasionally truncate or pointed, chaotically orientated, with a pivotal bar. Vicarious avicularia not observed. Ovicell prominent, globular, slightly immersed to distal autozooecium, with non porous frontal.

R e m a r k s: Vicarious avicularia have not been observed, even Cook (1977) refer to be often presented. Beside this feature, the studied specimens are identical with the lectotype. The usually number of foramina is two; rarely only one foramen is presented .