SHARKS AND RAYS FROM THE MOKATTAMIAN STAGE (MIDDLE AND LATE EOCENE) OF EGYPT, INCLUDING SOME SPECIES FROM THE MIDDLE EOCENE MIDRA SHALE OF QATAR

ASAN, Anhar; SALAME, Iman; STROUGO, Amin

doi:10.21608/egjg.2022.173845.1028

SHARKS AND RAYS FROM THE MOKATTAMIAN STAGE (MIDDLE AND LATE EOCENE) OF EGYPT, INCLUDING SOME SPECIES FROM THE MIDDLE EOCENE MIDRA SHALE OF QATAR

Document Type : Original Article

Authors

¹ Geology department Ain Shams University Faculty of Science

² Geology department, Faculty of Science, Ain Shams University

³ Geology department, Faculty of Science Ain Shams University

10.21608/egjg.2022.173845.1028

Abstract

Twenty six species of “megascopic” elasmobranchs have been identified, described and figured, and a local biostratigraphic scheme has been constructed. Ginglymostoma angolense Dartevelle & Casier, 1943 is reported for the first time from the Egyp‌tian Eocene. The average size of Misrichthys stromeri Case & Cappetta, 1990 seems to be age dependent, younger popula‌tions generally being larger in size. If this trend is confirmed by future studies, it may be used to separate specifically older populations from younger ones. Several species appear to be characteristic of specific horizons and, hence, could be used in the future for regional biostratigraphic correlation.

Ginglymostoma angolense Dartevelle & Casier, 1943, «Carcharias» koerti (Stromer, 1910), Moerigaleus vitreodon Under‌wood &Ward, 2011, Rhizoprionodon sp. and Anoxypristis mucrodens (White, 1926) are reported for the first time from the middle Eocene of Qatar.

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