Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 82. (Budapest 1990)
Inesta, M. N., Szabó, J. ; Szente, I.: A Pliensbachian gastropod and bivalve faunula from the Mola Hill (Betic Cordilleras, Spain)
ANNALES HISTORICO-NATURALES MUSEI NATIONALIS HUNGARICI Tomus 82. Budapest, 1990 p. 19-23. A Pliensbachian gastropod and bivalve faunula from the Mola Hill (Betic Cordilleras, Spain) by M. INESTA, Novelda, J. SZABÓ & I. SZENTE, Budapest M. INESTA, J. SZABÓ & I. SZENTE: A Pliensbachian gastropod and bivalve faunula from the Mola Hill (Betic Cordilleras, Spain). - Annls hist.-nat. Mus. natn. hung. 1990, 82: 19-23. Abstract - First registration of an Alpine type Pliensbachian benthic molluscan assemblage from the Betic Cordilleras. With 1 figure and 1 photoplate. Introduction- Benthic molluscs seem to be excellent palaeo(bio)geographical indicators, they could help to track the course of (plate)tectonic evolution. However, the number of published Jurassic data are extremely low, especially from the Mediterranean area where numerous blocks of different palaeogeographic origin have got into allochthonous geological position. In this situation, even a little faunula in bad state of preservation, like the available one, may serve important data. The material has been collected and the geological setting is outlined here by M. INESTA; gastropod and bivalve data are gi-ven by J. SZABÓ and I. SZENTE, respectively. The specimens are deposited at the Palaeontological Section of the Novelda Municipal History Museum (Alicante). LOCALITY The faunula was collected at Mola Hill near town Novelda(Betic Cordilleras, Prov. Alicante, SE Spain). This hill is a relatively small, isolated block, belonging to the easternmost part of the External Subbetic Zone (AZEMA 1977). The lithology is typical to that of submerging carbonate platform: massive, white limestone with little megafossil content as underlaying beds and rhytmic alterations of grey or pink pelagic marls and limestones as overlaying beds. The matrix, relative rich in fossils, is a bluish-gray, sometimes marly limestones, transitional between the platform and the pelagic sediments. The cooccurring fossils are cephalopods (ammonites and belemnites), gastropods, bivalves and brachiopods. The ammonites indicates belonging to the Domerian substage of the locality (det. J. C. BRAGA, Univ. Granada): Arieticeras bertrandi (KILIAN), Leptaleoceras ugdulenai (GEMME LLARO ) , Lepta- leoceras canavarii CGEMM.), Amaltheus margaritatus (M0NF0RT) and Protogrammo- ceras sp . Palaeobiogeographically , the Betic Cordilleras are a part of the Jurassic Mediterranean Ammonite Province (BRAGA et al. 1984). BENTHIC MOLLUSCS The fossils are poorly preserved, the originally aragonitic shells are dissolved so the specimens have become inner moulds, sometimes with shell remains. Pectinids (and brachiopods) are shelly but usually badly damaged. In
