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Leptauchenia decora Leidy 1856 (oreodont)

Osteichthyes - Artiodactyla - Merycoidodontidae

PaleoDB taxon number: 47541

Synonyms: Cyclopidius brevifacies Cope 1877 (no. 45414), Cyclopidius decedens Cope 1884 (no. 45416), Cyclopidius loganensis Koerner 1940 (no. 45421), Cyclopidius schucherti Thorpe 1921 (no. 45424), Hadroleptauchenia eiselyi Schultz and Falkenbach 1968 (no. 46762), Hadroleptauchenia primitiva Schultz and Falkenbach 1968 (no. 46764), Leptauchenia brevifacies Cope 1877 (no. 47538), Leptauchenia eiselyi Schultz and Falkenbach 1968 (no. 47543), Leptauchenia harveyi Schultz and Falkenbach 1968 (no. 47544), Leptauchenia martini Schultz and Falkenbach 1968 (no. 47548), Leptauchenia minora Schlaikjer 1935 (no. 47550), Leptauchenia orellaensis Schultz and Falkenbach 1968 (no. 47552), Leptauchenia parasimus Schultz and Falkenbach 1968 (no. 47553), Pithecistes altageringensis Schultz and Falkenbach 1968 (no. 50362), Pithecistes breviceps Loomis 1925 (no. 50363), Pithecistes brevifacies Cope 1877 (no. 50364), Pithecistes copei Schultz and Falkenbach 1968 (no. 50365), Pithecistes decedens Cope 1884 (no. 50366), Pithecistes facies Cope 1888 (no. 50367), Pithecistes mariae Schultz and Falkenbach 1968 (no. 50369), Pithecistes tanneri Schultz and Falkenbach 1968 (no. 50370), Pseudocyclopidius orellaensis Schultz and Falkenbach 1968 (no. 51171)

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

Sister taxa: Leptauchenia lullianus, Leptauchenia major

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 loganensis: Its type locality is Fort Logan, which is in an Arikareean terrestrial horizon in Montana.
  • Cyclopidius schucherti: Its type locality is Hermosa, which is in a Hemingfordian terrestrial horizon in South Dakota.
  • 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

Average measurements (in mm): m1 8.90 x 6.50, m2 10.0 x 7.0, m3 18.0 x 7.0