Fig. 18. A in Palaeobiogeographic and evolutionary meaning of an early Late Tournaisian ammonoid fauna from the Tafilalt of Morocco

Fig. 18. A. Muensteroceras quadriconstrictum sp. nov., holotype MB.C.3922. B. Muensteroceras quadriconstrictum sp. nov., MB.C.3945. C. Muensteroceras quadriconstrictum sp. nov., MB.C.3946. D. Muensteroceras quadriconstrictum sp. nov., MB.C.3924. E. Muensteroceras quadriconstrictum sp. nov., MB.C.3934. F. Muensteroceras quadriconstrictum sp. nov., MB.C.3927. G. Muensteroceras quadriconstrictum sp. nov., MB.C.3928. H. Eurites bouhamedensis sp. nov.; holotype MB.C.3947. I. Eurites bouhamedensis sp. nov., MB.C.3952. All × 3. All specimens figured in ventral (A1), apertural (B1, C1, etc.), and lateral (A2, B2, etc.) views.