Maenioceras Schindewolf, 1933

Korn, Dieter & Bockwinkel, Jürgen, 2021, The pharciceratid ammonoids from the Roteisenstein Formation of Dillenburg (Cephalopoda, Ammonoidea), European Journal of Taxonomy 771, pp. 1-79 : 7

Genus Maenioceras Schindewolf, 1933

Type species

Goniatites terebratus Sandberger & Sandberger, 1851 , by original designation.

Diagnosis

Maenioceratidae with strong ventrolateral grooves; shell without constrictions or internal thickenings. Suture line formula (E2 E1 E2) L U2 U1 I. Lateral lobe V-shaped, moderately deep; ventrolateral saddle subacute.

Included species

Goniatites terebratus Sandberger & Sandberger, 1851 , Rhenish Mountains; Maeneceras decheni Holzapfel, 1895 , Rhenish Mountains; Maenioceras heinorum Ebbighausen, Becker & Bockwinkel in Ebbighausen et al., 2007, Rhenish Mountains; Maeneceras tenue Holzapfel, 1895 , Rhenish Mountains; Maenioceras ornatum sp. nov., Rhenish Mountains.

Remarks

The genus Maenioceras needs revision, especially with regard to the North African records. Only then can it be determined how many and which species can be considered valid. The current knowledge about the possible concordance of Central European and North African species is poor and little is known about the diversity of the maenioceratids. A revision of the genus is not the subject of the investigations here. We limit ourselves to the description of the specimens found in the Red Ironstone.