Vladan J. Radulović

Taxonomy and Paleobiogeography of Late Bathonian Brachiopods from Gebel Engabashi, Northern Sinai

Abstract A brachiopod fauna of late Bathonian age recovered from the Kehailia Formation from Gebel Engabashi in northern Sinai consists of six species (two rhynchonellids and four terebratulids) referred to six genera, of which one genus and two species are new: Globirhynchia sphaerica (Cooper, 1989) new combination, Daghanirhynchia angulocostata Cooper, 1989, Ectyphoria sinaiensis new species, Cooperithyris circularis new genus and species, and new material: Avonothyris species A, and Ptyctothyris species A. The brachiopods described herein comprise a fauna located at the northern part of the Indo–African Faunal Realm within the Jurassic Ethiopian Province. They extend the geographic distribution of those taxa that show great affinity with the Jurassic brachiopod fauna of Saudi Arabia described by Cooper (1989). Differentiation of the endemic faunas that is so characteristic of many of these Ethiopian Province faunas is becoming more well-defined.

Sinaithyris, a new name for the Middle Jurassic terebratulid brachiopod Cooperithyris Feldman, Radulović, Hegab, and Radulović, 2012 preoccupied by Cooperithyris Tchorszevsky, 1988

Feldman, Radulovic, Hegab, and Radulovic (2012) established the genus Cooperithyris for an upper Bathonian terebratulid brachiopod from Gebel Engabashi, northern Sinai, …

The Ammonites of the Bifrons Zone (Toarcian, Lower Jurassic) from Mihailovići (Northern Montenegro)

The base of the red pelagic nodular limestones exposed near the Mihailovići Pass (Northern Montenegro) yielded condensed Toarcian fossil assemblage consisting uniquely of ammonites. The ammonites were collected from marker horizon associated with prominent hardground surface. This assemblage is composed both of species of worldwide distribution and proper Tethyan dispersal. It includes frequent Lytoceratina and common Phylloceratina and Ammonitina. The latter allowed the biostratigraphic definition of the fossiliferous horizon as mid-Bifrons Subzone of the Lower Toarcian Bifrons Zone. Thirteen ammonite taxa were studied: Phylloceras heterophyllum (Sowerby), P. prinzi Géczy, Calliphylloceras nilssoni (Hebert), Lytoceras toarcense Rulleau, Nodicoeloceras angelonii (Ramaccioni), Hildoceras lusitanicum Meister, H. bifrons (Bruguière), Cingolites aff. picenus Sassaroli & Venturi, Osperleioceras subexaratum (Bonarelli), Harpoceras mediterraneum Pinna, Phymatoceras anomalum Merla, Ph. gr. narbonense Buckman and Ph. cf. formosum Rulleau & Elmi. One specimen was defined as Harpoceras sp. n. since it did not match any species from the literature, but might be erected as a new specific name if further materials appear.