Ammonoids from the Dalle des Iridet of the Mouydir and Ahnet (Central Sahara) and the Formation d'Hassi Sguilmaof the Saoura Valley (Late Tournaisian—Early Visean; Algeria)

摘要

Four ammonoid species are described from the Early Carboniferous (Mississippian) Ir-idet Formation of the Ahnet and Mouydir (Central Sahara, Algeria); three of which arenew: Eurites temertassetensis n. sp., Trimorphoceras teguentourense n. sp., and Trimor-phoceras azzelmattiense n. sp. The species can be attributed to the North African Am-monellipsites-Merocanites Assemblage (Fascipericyclus-Ammonellipsites Genus Zone;Late Tournaisian to Early Visean). Additionally, the two new species Ammonellipsitessguilmensis n. sp. and Muensteroceras beniabbesense n. sp. are described from the timeequivalent Hassi Sguilma Formation of the Saoura Valley (north-western Algeria).