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, Maderia casitensis, Maderia marcoensis, Maderia marcosensis, Maderia coahuilensis, Taraisites bosei, Subastieria inordinata, Subastieria sulcosae, Subastieria sulcosus, Subastieria balkanica, Astieria raricostata, Astieria neohispanica, Holcostephanus (Astieria) josephinus, Astieria zacatecana, Astieria bangei

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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