Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 90. (Budapest 1998)

Dulai, A.: Early Jurassic brachiopods from the basal layers of the Pisznice Limestone of Lábatlan (Gerecse Mts, Hungary)

Zeilleria mutabilis (OPPEL) ( 1 ) Zeilleria cf. balilla (GEYER) (3) Zeilleria sp. (2) Terebratulida indet. (26) The distribution of the determined species along the examined section is shown on Fig. 3. Póckő This locality is situated only a few hundred meters from the Tölgyhát quarry, therefore the features of the Pisznice Limestone are very similar. However, a remarkable difference is that the formation is thinner-bedded here, so four layers can be distinguished within the same thickness of section (about 3.5 meters) (Fig. 4). About 20 brachiopod specimens can be found in the collection of the Hungarian Geological Institution from the Póckő locality, which represent a fairly diverse fauna (1

1 species). These specimens were collected by K. KULCSÁR, GY. VÍGH and E. VADÁSZ in the first half of the 20th century. The determined species as revised by the present author, are the following: Cirpa latifrons (S'lUR in GEYER) (1) Cirpa cf. variabilis (SCHLOTHEIM) (1) Calcirhynchia plica!issima (QUENSTEDT) (1) Prionorhynchia pseudopolyptycha (Bi)CKH) (1) Cuneirhynchia fraasi (OPPEL) (1) Liospiriferina alpina (OPPEL) (1) Liospiriferina guembeli (NEUMAYR) (1) Liospiriferina sp. (2) Koninckodonta sp. (1) Linguithyris aspasia (MENEGHINl) (1) Zeilleria mutabilis (OPPEL) (3) Zeilleria venusta (UHLIG) (1) Zeilleria choffati (HAAS) (2) Zeilleria sp. (2) Rakonyilhyris sp. 0) Unfortunately, the exact stratigraphie position of these specimens is unknown within the Póckő section. Therefore, in the following discussion only those specimens will be taken into consideration, which were collected bed-by-bed by the author. The specimens in the collection of the Hungarian Geological Institution will only be mentioned in some AnnLs hist.-nat. Mus. natn. hung. 90, 1998