Cephalopoda - Ammonitida - Olcostephanidae

Full reference: R. W. Imlay. 1940. Neocomian Faunas of Northern Mexico. Geological Society America Bulletin 51(1):117-190

Belongs to Maderia according to R. W. Imlay 1940

Sister taxa: Olcostephanus (Jeannoticeras), Olcostephanus (Olcostephanus), Olcostephanus (Viluceras), Olcostephanus astierianus, Olcostephanus atherstoni, Olcostephanus delicatecostatus, Olcostephanus detonii, Olcostephanus paucicostatus, Olcostephanus pecki, Olcostephanus popenoei, Olcostephanus sanlazarensis, Maderia marcosensis, Maderia casitensis, Subastieria sulcosae, Subastieria sulcosus, Subastieria balkanica, Subastieria inordinata, Taraisites bosei, Astieria raricostata, Astieria bangei, Astieria neohispanica, Astieria zacatecana, Holcostephanus (Astieria) josephinus

Type specimen: UMMP 12163, a shell

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell diameter 15.0

Distribution: found only at 18-Coahuila (Cretaceous of Mexico)

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Specimen images are retrieved through the ePANDDA API.