Allosaurus fragilis Marsh 1877 (allosauroid)

Reptilia - Theropoda

Alternative combinations: Allosaurus agilis, Antrodemus fragilis

Synonyms: Allosaurus amplexus Cope 1878, Allosaurus atrox Marsh 1878, Allosaurus ferox Marsh 1896, Allosaurus lucaris Marsh 1878, Allosaurus lucarius Marsh 1878, Antrodemus atrox Marsh 1878, Antrodemus lucaris Marsh 1878, Antrodemus trihedrodon Cope 1877, Antrodemus valens Leidy 1870, Antrodesmus lucaris Marsh 1878, Antrodesmus valens Leidy 1870, Apatodon mirus Marsh 1877, Creosaurus atrox Marsh 1878, Dryptosaurus trihedridon Cope 1877, Dryptosaurus trihedrodon Cope 1877, Epanterias amplexus Cope 1878, Labrosaurus ferox Marsh 1884, Labrosaurus lucaris Marsh 1878, Laelaps trihedrodon Cope 1877, Megalosaurus valens Leidy 1870, Poicilopleuron valens Leidy 1870, Saurophagus maximus Ray 1941

Full reference: O. C. Marsh. 1877. Notice of new dinosaurian reptiles from the Jurassic formation. American Journal of Science and Arts 14:514-516

Belongs to Allosaurus according to International Commission on Zoological Nomenclature 2023

See also Aureliano et al. 2018, Bakker 1990, Bakker 1996, Bakker et al. 1992, Bell 2010, Bell and Coria 2013, Benson et al. 2010, Bever and Norell 2009, Bittencourt and Kellner 2009, Bonaparte 1991, Breithaupt 1996, Bronowicz 2011, Brougham et al. 2019, Buffetaut et al. 1995, Carpenter 1997, Carpenter 1999, Carrano et al. 2012, Choiniere et al. 2010, Chure 1995, Chure et al. 2006, Cope 1877, Cope 1877, Cope 1878, Cope 1878, Coria and Currie 2016, Currie and Padian 1997, Czaplewski et al. 1994, Dal Sasso et al. 2018, Dalman 2014, Decker 2012, Delcourt 2018, Delsate and Ezcurra 2014, Dollo 1883, Farlow 2001, Fernandes de Azevedo et al. 2013, Ferrante et al. 2021, Foster and Chure 2000, Foster et al. 2016, Foster and Peterson 2016, Galiano and Albersdörfer 2010, Galiano and Albersdörfer 2010, Gauthier 1986, Gilmore 1920, Gutherz et al. 2020, Hanna 2002, Hanson and Makovicky 2013, Hay 1902, Hay 1930, Hendrickx and Mateus 2014, Holtz et al. 2004, Hone et al. 2011, Huene 1914, Huene 1919, Huene 1923, Hunt 1986, Hunt and Lucas 2006, Hutt et al. 1989, Irmis and Knoll 2008, Jaekel 1911, Jain et al. 1962, Jensen 1984, Johnson 1931, King 1878, Knight 1900, Knoll et al. 1999, Kobayashi and Barsbold 2005, Kuhn 1939, Lambe 1904, Lapparent 1947, Lapparent 1962, Larsson 2001, Lawson 1976, Leidy 1870, Leidy 1873, Lisak 1980, Lull 1911, Lull 1911, Lull 1924, Madsen 1976, Madsen and Miller 1979, Madsen and Stokes 1972, Madsen and Stokes 1978, Maganuco et al. 2007, Malafaia et al. 2007, Malafaia et al. 2008, Malafaia et al. 2009, Malafaia et al. 2010, Malkani 2006, Mansel-Pleydell 1902, Marsh 1877, Marsh 1877, Marsh 1878, Marsh 1879, Marsh 1896, Marsh 1897, Martínez and Novas 2006, Mateer 1987, Mateus 2006, Mateus et al. 2011, Mateus et al. 2006, McGinnis 1982, Mojon 2001, Molnar 1974, Molnar 1980, Molnar 1980, Molnar 1991, Molnar et al. 1981, Molnar et al. 1985, Molnar et al. 1990, Molnar and Pledge 1980, Molnar and Wiffen 1994, Mook 1916, Nopcsa 1901, Novas 1996, Olshevsky 1991, Ortega et al. 2009, Osborn 1903, Osborn and Mook 1919, Osborn and Mook 1919, Osmólska 1996, Padian and Hutchinson 1997, Paton 1975, Paul 1988, Paulina Carabajal and Canale 2010, Paulina Carabajal and Currie 2012, Perrier 1928, Pinna 1967, Piveteau 1923, Rauhut 2003, Rauhut and Kriwet 1994, Ray 1941, Rich et al. 1992, Sakagami and Kawabe 2020, Salisbury et al. 2016, Sampson and Witmer 2007, Sanz 2000, Sanz et al. 1992, Sauvage 1880, Scanlon 2006, Schweitzer 1997, Senter et al. 2004, Smith 1997, Smith 1997, Smith 1998, Smith 2007, Smith and Merrill 2006, Steel 1970, Stovall 1943, Stromer 1915, Stromer 1931, Stromer 1934, Stromer 1934, Swinton 1970, Taquet and Welles 1977, Tatarinov 1964, Thulborn 1984, Titus et al. 2021, Turner et al. 2007, Turner et al. 2011, Untermann and Untermann 1954, Versluys 1910, Vetter 1884, von Zittel 1911, Walcott 1900, Watabe et al. 2008, Weishampel et al. 1991, Welles 1972, White et al. 2015, White et al. 2012, Williston 1878, Wings et al. 2007, Woodward 1885, Wu et al. 2009, Xing et al. 2009, Xing et al. 2014, Xu et al. 2011, Yadagiri 1982, Young 1958, Zahner and Brinkmann 2019 and Zittel 1890

Sister taxa: Allosaurus amplus, Allosaurus europaeus, Allosaurus jimmadseni, Allosaurus lucasi, Labrosaurus sulcatus

Type specimens:

  • Allosaurus fragilis: USNM 4834 (formerly YPM 1930), a partial skeleton. Its type locality is Felch Quarry 1, Garden Park (YPM), which is in a Kimmeridgian/Tithonian channel sandstone/claystone in the Morrison Formation of Colorado.
  • Allosaurus ferox: YPM 1893. Its type locality is Quarry 14, Como Bluff (YPM), which is in a Kimmeridgian/Tithonian wet floodplain siltstone in the Morrison Formation of Wyoming.
  • Allosaurus lucaris: YPM 1931. Its type locality is Quarry 3, Como Bluff (YPM), which is in a Kimmeridgian/Tithonian wet floodplain mudstone in the Morrison Formation of Wyoming.
  • Apatodon mirus:
  • Creosaurus atrox: YPM 1890, a partial skeleton. Its type locality is Quarry 1, Como Bluff (YPM), which is in a Kimmeridgian/Tithonian wet floodplain claystone in the Morrison Formation of Wyoming.
  • Epanterias amplexus: AMNH 5767. Its type locality is Cope Quarry III, Cope's Nipple, which is in a Tithonian dry floodplain mudstone in the Morrison Formation of Colorado.
  • Labrosaurus ferox: USNM 2315, a mandible. Its type locality is Felch Quarry 1, Garden Park (YPM), which is in a Kimmeridgian/Tithonian channel sandstone/claystone in the Morrison Formation of Colorado.
  • Laelaps trihedrodon: AMNH (lost), a mandible. Its type locality is Cope Quarry I, Cope's Nipple, which is in a Kimmeridgian/Tithonian dry floodplain mudstone in the Morrison Formation of Colorado.
  • Poicilopleuron valens: USNM 218, a set of vertebrae. Its type locality is Middle Park (USNM 218), which is in a Kimmeridgian/Tithonian pond horizon in the Morrison Formation of Colorado.
  • Saurophagus maximus: Its type locality is Stovall's Pit 1, Kenton (OMNH V92), which is in a Kimmeridgian/Tithonian wet floodplain mudstone/sandstone in the Morrison Formation of Oklahoma.

Ecology: ground dwelling carnivore

Average measurements (in mm): femur circumference 323.1, fibula circumference 113.8, tibia circumference 278.0

Distribution:

• Jurassic of United States (26: Colorado, Oklahoma, Utah, Wyoming collections)

Total: 26 collections including 29 occurrences

Show more details


Specimen images are retrieved through the ePANDDA API.


Click image to enlarge. Click to access iDigBio record.