Maenioceras Schindewolf, 1933

Bockwinkel, Jürgen & Korn, Dieter, 2024, Ammonoids of the Middle Devonian family Maenioceratidae in the Anti-Atlas of Morocco, European Journal of Taxonomy 921 (1), pp. 1-35 : 6

Genus Maenioceras Schindewolf, 1933

Type species

Goniatites terebratus Sandberger & Sandberger, 1851 ; original designation.

Diagnosis

Genus of the family Maenioceratidae with ventrolateral grooves; shell usually without constrictions or internal thickenings. External lobe very wide or extremely wide; E 2 lobe usually very shallow, broadly rounded; ventrolateral saddle narrowly rounded or subangular; lateral lobe V-shaped, angular or blunt.

Included species

Rhenish Mountains ( Sandberger & Sandberger 1850 –1856; Holzapfel 1895; Ebbighausen et al. 2007; Korn &Bockwinkel 2021;this paper): Goniatites terebratus Sandberger & Sandberger, 1851 ; Maeneceras tenue Holzapfel, 1895 ; Maeneceras Decheni Holzapfel, 1895 ; Maenioceras heinorum Ebbighausen, Becker & Bockwinkel in Ebbighausen et al., 2007; Maenioceras ornatum Korn & Bockwinkel, 2021 .

Anti-Atlas (this paper): Maenioceras afroterebratum sp. nov.; Maenioceras mzerrebense sp. nov.; Maenioceras oufranense sp. nov.; Maenioceras beckeri sp. nov.

Remarks

The North African records of Maenioceras needed revision. Increasing knowledge led to the result that the North African species differ from those described from material of the Rhenish Mountains, although there is close resemblance between some of the species. With respect to the morphological differences, new species are described here.