Cephalopoda - Ammonitida - Olcostephanidae

Full reference: M. B. Aguirre-Urreta and P. F. Rawson. 1999. Lower Cretaceous ammonites from the Neuquen Basin, Argentina: Viluceras, a new Valanginian subgenus of Olcostephanus. Cretaceous Research 20:343-357

Parent taxon: Olcostephanus according to F. A. Mourgues et al. 2015

See also Aguirre-Urreta and Rawson 1999

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

Subtaxa: Olcostephanus (Viluceras) araucanus Olcostephanus (Viluceras) duraznoensis Olcostephanus (Viluceras) permolestus

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Type: Simbirskites permolestus

Ecology: fast-moving nektonic carnivore

Distribution:

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