Fragmenta Minerologica et Palaeontologica

Author(s): Szente, I.
Title: Bivalve ecology in the Pliensbachian (Lower Jurassic) of the Bakony Mts (Hungary). Description of a new species of Eopecten
Year: 1996
Volume: 18
Pages: 19-29.

Abstract: In the Bakony Mts. the Pliensbachian stage is represented by deeper-water facies characteristic of the peri-Mediterranean Lower Jurassic. Large-scale collecting work resulted in a moderately diverse bivalve fauna comprising nearly 500 specimens belonging to some 30 taxa. Paleoecological analysis of the bivalve assemblages representing the main depositional environments (tops and slopes of seamounts as well as basins between them) suggests that distribution of bivalves was controlled by the nature of substrate and by the food supply. Suspension feeders are by far the dominant feeding group. Possibly micro-carnivorous bivalves mainly inhabited basinal environments. Seamounts were populated by epifaunal byssally attached genera such as Praechlamys, Parainocerannts, Limea (Pseudolimea) and Plagiostoma. Among pectinids smooth or finely ornamented scallops aie especially characteristic of seamount top environments. Beside the abundant Parainoceramus, deep and shallow burrowing taxa (Pleuromya, indeterminate heterodonts) as well as presumably anomalodesmatan bivalves characterize the assemblage of basinal sediments.

Journal: Fragmenta Minerologica et Palaeontologica
Journal abbreviation:
ISSN: 0367-2697
Publisher: Magyar Természettudományi Múzeum, Budapest
Editor(s): Vörös, A. & Matskási, I.