Genus Costimitoceras Vöhringer, 1960

Type species

Costimitoceras ornatum Vöhringer, 1960: 148; original designation.

Genus diagnosis

Genus of the Acutimitoceratinae with a discoidal conch and moderately high to high coiling rate (WER = 1.90–2.20); inner whorls evolute. Ornament with biconvex growth lines and spiral lines. Suture line with deep external lobe.

Genus composition

Central Europe (Vöhringer 1960): Costimitoceras ornatum Vöhringer, 1960 .

North Africa(Ebbighausen & Bockwinkel 2007): Costimitoceras aitouamar Ebbighausen& Bockwinkel, 2007 .

South China (Ruan 1981): Imitoceras (Costimitoceras) epichare Ruan, 1981 .

Remarks

Costimitoceras can be easily distinguished from all other prionoceratids due to the very striking combination of coarse growth lines and spiral lines.