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The nodular limestones exposed at the basal part of the Gebel Hafit (United Arab Emirates) represent a truncation surface, between the Rus and the Middle Eocene Dammam Formation (Mibazara Member). Somalina praestefaninii n.sp. is a new large foraminiferal species separated from the Mibazara member. It is believed that Somalina praestefaninii n.sp. is the ancestral form of Somalina stefaninii Silvestri as it is smaller and has a more simple protoconch. Here, it is believed that the taxon Somalina (Lutetian) could possibly be derived from Opertorbitolites NUTTALL , 1925 (the taxon characteristic for the Ypresian).

Somalina praestefaninii n. sp., a New Species of Large Foraminifera from the Dammam Formation (Lutetian) of Gebel Hafit, United Arab Emirates