Penetrigonias Tanner and Martin 1976 (rhinoceros)

Mammalia - Perissodactyla - Rhinocerotidae

Full reference: L. G. Tanner and L. D. Martin. 1976. New Rhinocerotoids from the Oligocene of Nebraska. ATHLON: Essays on Palaeontology in Honour of Loris Shano Russell 210-219

Parent taxon: Rhinocerotidae according to D. R. Prothero 2005

See also Carroll 1988, Prothero 1998, Prothero and Schoch 1989 and Tanner and Martin 1976

Sister taxa: Aceratheriinae, Aceratheriini, Amphicaenopus, Anchisodon tubifer, Atelodus, Diceratheriinae, Dicerorhininae, Forstercooperia crudus, Gigantamynodon akespensis, Gulfoceras, Huangotherium, Iranotheriinae, Menoceratinae, Rhinoceros crassus, Rhinoceros oregonensis, Rhinocerotinae, Subhyracodon, Teleoceratinae, Teletaceras, Trigonias, Uintaceras, Woodoceras, Zalabis

Subtaxa: Penetrigonias dakotensis Penetrigonias sagittatus

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Type: Caenopus dakotensis

Ecology: ground dwelling browser

Distribution:

• Oligocene of United States (1: South Dakota collection)

• Eocene of Canada (2: Saskatchewan), United States (9: Colorado, Montana, Nebraska, Texas, Utah, Wyoming)

Total: 12 collections each including a single occurrence

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