Leptauchenia decora Leidy 1856 (oreodont)

Mammalia - Ungulata - Merycoidodontidae

Synonyms: Cyclopidius (Chelonocephalus) schucherti Thorpe 1921, Cyclopidius brevifacies Cope 1877, Cyclopidius decedens Cope 1884, Cyclopidius loganensis Koerner 1940, Cyclopidius schucherti Thorpe 1921, Hadroleptauchenia eiselyi Schultz and Falkenbach 1968, Hadroleptauchenia primitiva Schultz and Falkenbach 1968, Leptauchenia brevifacies Cope 1877, Leptauchenia eiselyi Schultz and Falkenbach 1968, Leptauchenia harveyi Schultz and Falkenbach 1968, Leptauchenia martini Schultz and Falkenbach 1968, Leptauchenia minora Schlaikjer 1935, Leptauchenia orellaensis Schultz and Falkenbach 1968, Leptauchenia parasimus Schultz and Falkenbach 1968, Pithecistes altageringensis Schultz and Falkenbach 1968, Pithecistes breviceps Loomis 1925, Pithecistes brevifacies Cope 1877, Pithecistes copei Schultz and Falkenbach 1968, Pithecistes decedens Cope 1884, Pithecistes facies Cope 1888, Pithecistes mariae Schultz and Falkenbach 1968, Pithecistes tanneri Schultz and Falkenbach 1968, Pseudocyclopidius orellaensis Schultz and Falkenbach 1968

Full reference: J. Leidy. 1856. Notice of remains of extinct Mammalia, discovered by Dr. F. V. Hayden in Nebraska Territory. Proceedings of the Academy of Natural Sciences of Philadelphia 8:88-90

Belongs to Leptauchenia according to D. R. Prothero and F. Sanchez 2008

See also CoBabe 1996, Cope 1877, Cope 1884, Hay 1902, Koerner 1940, Lander 1998, Leidy 1856, Leidy 1857, Loomis 1925, Schlaikjer 1935, Schultz and Falkenbach 1968, Scott 1940, Stevens and Stevens 2007, Thorpe 1921 and Thorpe 1937

Sister taxa: Leptauchenia lullianus, Leptauchenia major, Cyclopidius (Chelonocephalus)

Type specimens:

  • Leptauchenia decora: Its type locality is Eagle Nest Butte (Brule), which is in an Arikareean terrestrial horizon in the Brule Formation of South Dakota
  • Cyclopidius (Chelonocephalus) schucherti: YPM 10123, a skull. Its type locality is Hermosa, which is in a Hemingfordian terrestrial horizon in South Dakota.
  • Cyclopidius loganensis: Its type locality is Fort Logan, which is in an Arikareean terrestrial horizon in Montana.
  • Hadroleptauchenia eiselyi:
  • Hadroleptauchenia primitiva: Its type locality is Hay Creek, which is in a Whitneyan terrestrial horizon in the Brule Formation of South Dakota.
  • Leptauchenia harveyi: Its type locality is UNSM Sx-15 (Whitney A), which is in a Whitneyan terrestrial horizon in the Brule Formation of Nebraska.
  • Leptauchenia martini: Its type locality is Potato Creek (Sharps A), which is in a Geringian terrestrial horizon in the Sharps Formation of South Dakota.
  • Leptauchenia minora: MCZ 2841, a partial skull. Its type locality is Bear Creek Mountain (East), which is in an Arikareean terrestrial horizon in the Harrison Formation of Wyoming.
  • Leptauchenia parasimus:
  • Pithecistes altageringensis: Its type locality is Little Muddy Creek (Niobrara County), which is in an Arikareean terrestrial horizon in Wyoming.
  • Pithecistes breviceps:
  • Pithecistes brevifacies:
  • Pithecistes copei:
  • Pithecistes decedens:
  • Pithecistes facies:
  • Pithecistes mariae: Its type locality is Sheep Mountain (Sharps A), which is in a Geringian terrestrial horizon in the Sharps Formation of South Dakota.
  • Pithecistes tanneri:
  • Pseudocyclopidius orellaensis: Its type locality is Douglas Area Brule (5-6a), which is in an Orellan terrestrial horizon in the Brule Formation of Wyoming.

Ecology: ground dwelling herbivore

Distribution:

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

• Harrisonian of United States (1: Nebraska)

• Arikareean of United States (23: Montana, Nebraska, South Dakota, Wyoming)

• Oligocene of United States (65: Colorado, Nebraska, North Dakota, South Dakota, Wyoming)

Total: 90 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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