Original paper

Gastropods from the Lower Cenomanian of Koraćica (Kosmaj Mountain, central Serbia)

Ayoub-Hannaa, Wagih; Radulović, Barbara V.; Radulović, Vladan J.; Fürsich, Franz Theodor

Abstract

Twenty Early Cenomanian gastropod taxa belonging to 14 genera and 10 families are systematically described from reddish coarse-grained bioclastic packstones to rudstones of the Grab well section (Kosmaj Mountain) of the Vardar Zone of central Serbia. The fauna is strongly dominated by Ampullinidae and Pleurotomariidae followed by Tylostomatidae. This paper describes three new species: Anodomaria kosmajae sp. nov., Latiala? callositae sp. nov., and Pseudonerinea jovankae sp. nov. In addition, seven species, Conotomaria folkestonensis Cox 1960b, Astele gurgitis (Brongniart, 1822), Pictavia pungens (J. de C. Sowerby in Fitton, 1836), Pseudamaura subbulbiformis (d'Orbigny, 1850), Tylostoma elevatum (Shumard, 1853), Tylostoma cf. minimum white, 1887, and Avellana subincrassata d'Orbigny, 1850 are recorded from the Lower Cenomanian of Serbia for the first time. Two species are described in open nomenclature. The identified gastropod species come from a half-a-meter-thick and approximately 2-m-long lens with hundreds of reworked fossils. The faunal elements of this assemblage are mostly disarticulated, fragmented, and lack preferred orientation. Taphonomic and sedimentological data suggest that this lens is the result of a storm event (storm-wave concentration) and that the fossils are parautochthonous. The species lived in a shallow-marine setting above the storm wave-base, in warm-temperate waters within the photic zone.

Keywords

lower cenomaniangastropodspalaeoecologykosmaj mountaintaxonomycentral serbia