Cheloniceratinae Spath, 1923 (Ammonoidea, Douvilleiceratidae) in the upper Aptian (Lower Cretaceous) of North Sinai, Egypt

Abstract

New material of the ammonite subfamily Cheloniceratinae Spath, 1923 is described from the Aptian successions of the Maghara area. We record Cheloniceras cornuelianum as well as Epicheloniceras tschernyschewi from the lower and upper Aptian, respectively. These very widely distributed and common species are important for the supraregional correlation, and we establish their stratigraphic range for the Gabal Lagama and Gabal Abu Ruqum key sections. A short account is given about the palaeobiogeographic significance of both species.