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Palaeobiogeographic and evolutionary meaning of an early Late Tournaisian ammonoid fauna from the Tafilalt of Morocco

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Korn D., Bockwinkel J., Ebbighausen V., Klug C.

Acta Palaeontologica Polonica

2003

tom 48

nr 1

An early Late Tournaisian (Early Carboniferous/Mississippian) ammonoid fauna is described from the Tafilalt of south−eastern Morocco. Twelve genera, four of which are new, and eleven new species are represented: Becanites africanus sp. nov., Triimitoceras epiwocklumeriforme gen. et sp. nov., Irinoceras minutum sp. nov., Muensteroceras quadriconstrictum sp. nov., Eurites bouhamedensis sp. nov., Ouaoufilalites ouaoufilalensis gen. et sp. nov., Helicocyclus fuscus sp. nov., Pericyclus mercatorius sp. nov., Orthocyclus(?) sp., Bouhamedites enigmaticus gen. et sp. nov., Winchelloceras antiatlanteum sp. nov., and Progoniatites maghribensis gen. et sp. nov. Palaeogeographic analysis of Late Tournaisian ammonoid assemblages shows strong endemism at the species−level, but genera and families had a nearly global distribution in the equatorial seas. The new fauna contains the stratigraphically oldest known representatives of the important Carboniferous goniatite families Girtyoceratidae and Goniatitidae.

Ograniczanie wyników

1 Acta Palaeontologica Polonica

1 Bockwinkel J.

1 Ebbighausen V.

1 Klug C.

1 Korn D.

1 2003

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Palaeobiogeographic and evolutionary meaning of an early Late Tournaisian ammonoid fauna from the Tafilalt of Morocco