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Inesta, M. N., Szabó, J. ; Szente, I.: A Pliensbachian gastropod and bivalve faunula from the Mola Hill (Betic Cordilleras, Spain)

Pliensbachian faunula 21 in a fauna of the other two types. The widely distributed Amberleya (E

.) al- pina can be regarded as one of the "palaeobiogeographical indices" of the Alpine Subprovince", a part of the Mediterranean (Ammonite) Province, inhabited by the gastropods of the Alpine faunal type. On supraspecific taxonomic levels, the most important Alpine feature is the conservativism (or archaism; see more details in SZABÚ 1988) of the faunula. Like in other Alpine faunas, but not in non-Alpine ones, most of the species belong td Archaeogastropoda

. An only specimen of ? Oonia pennina (PARONA, 1892) seems to be a member of an order of higher evolutionary levels (Caenogastropoda

). However, it is necessary to call the attention that Discohelix species have not been found in the Mola Hill faunula though they, at least D. orbis (REUSS, 1852) and/or D. ex- cavata (REUSS, 1852), have not yet been lacking from the Pliensbachian Alpine faunas . It is necessary also to mention that the identifiable gastropod species have occurred usually in older (Late Sinemurian - Carixian) beds in other localities. The bivalve species do not bear any special palaeoecologic or palaeogeographic nor biostratigraphic meaning. * * * Acknowledgement- We are grateful to Dr. J.C. BRAGA (University of Granada) for identification of the ammonites. REFERENCES AZEMA, J. (1977): Étude géologique des Zones Externes des Cordillères Bétiques aux confins des Provinces d'Alicante et de Murcie (Espagne). - Thesis, Univ. Pierre et Marie Curie, Paris BRAGA, J. C

. , COMAS-RENGIFO

, M. 3., GOY

, A. & RIVAS, P. (1984): The Pliensbachian of Spain: ammonite successions, boundaries and correlations. - In: MICHELSEN, 0. & ZEISS, A. (eds): International Symposium on Jurassic stratigraphy. Erlangen, Symp. vol. J_: 160-176. SZABÚ, J. (1968): Pliensbachian and Baiocian Gastropods. - In: RAKUS

, M.

, DERCOURT

, J. & NAIRN, A. E. M. (eds): Evolution of the Northern Margin of Tethys, v. I. Mém. Soc. Géol

. France, Paris, (Nouv.) 154

: 25-33. Authors' addresses: MANUEL INESTA ALCOLEA 03660 - Novelda (Alicante), Lope de Vega, 59 3-A Spain Dr. JÁNOS SZABÚ Geological and Paleontological Department Hungarian Natural History Museum H-1370 Budapest, Múzeum krt. 14-16, Pf. 330 Hungary ISTVÁN SZENTE Paleontological Department Eötvös Loránd University H-1083 Budapest, Kun B. tér 2 Hungary