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Acrocanthosaurus atokensis
Taxonomy
Acrocanthosaurus atokensis was named by Stovall and Langston (1950). Its type specimen is OMNH 10146 (= MUO 8-0-S9), a partial skeleton, and it is a 3D body fossil. Its type locality is Cochran farm, OMNH V68, which is in an Aptian terrestrial shale in the Antlers Formation of Oklahoma.
Synonymy list
Year | Name and author |
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1950 | Acrocanthosaurus atokensis Stovall and Langston, Jr. p. 700 figs. 2-4, Pl.1-3 |
1970 | Acrocanthosaurus atokensis Steel p. 38 |
1970 | Acrocanthosaurus atokensis Swinton p. 143 |
1974 | Acrocanthosaurus atokensis Langston p. 84 |
1979 | Acrocanthosaurus atokensis Langston p. 42 |
1980 | Acrocanthosaurus atokensis Molnar and Pledge p. 286 |
1984 | Acrocanthosaurus atokensis Taquet p. 217 |
1986 | Acrocanthosaurus atokensis Gauthier p. 9 |
1988 | Acrocanthosaurus atokensis Paul p. 315 |
1990 | Acrocanthosaurus atokensis Molnar et al. p. 189 |
1996 | Acrocanthosaurus atokensis Buffetaut et al. p. 691 |
1997 | Acrocanthosaurus atokensis Vickaryous and Ryan p. 488 |
1998 | Acrocanthosaurus atokensis Harris p. 7–8 |
1998 | Acrocanthosaurus atokensis Lipka p. 231 |
1999 | Acrocanthosaurus atokensis Novas et al. p. 17R |
2000 | Acrocanthosaurus atokensis Currie and Carpenter p. 210 figs. 1-14 |
2001 | Acrocanthosaurus atokensis Farlow p. 409 |
2003 | Acrocanthosaurus atokensis Rauhut p. 36 |
2004 | Acrocanthosaurus atokensis Holtz, Jr. et al. p. 75 |
2005 | Acrocanthosaurus atokensis Suñer et al. p. 98 |
2005 | Acrocanthosaurus atokensis Yates p. 114 |
2006 | Acrocanthosaurus atokensis Malkani p. 8 |
2006 | Acrocanthosaurus atokensis Weishampel p. 144 |
2007 | Acrocanthosaurus atokensis Gishlick and Gauthier p. 577 |
2007 | Acrocanthosaurus atokensis Sampson and Witmer p. 33 |
2009 | Acrocanthosaurus atokensis Norell et al. p. 49 |
2009 | Acrocanthosaurus atokensis Parsons and Parsons p. 721 |
2010 | Acrocanthosaurus atokensis Paulina Carabajal and Canale p. 249 |
2012 | Acrocanthosaurus atokensis Carrano et al. p. 222 |
2012 | Acrocanthosaurus atokensis D'Emic et al. p. 15 |
2012 | Acrocanthosaurus atokensis Paulina Carabajal and Currie p. 86 |
2012 | Acrocanthosaurus atokensis White et al. p. 5 |
2013 | Acrocanthosaurus atokensis Shell and Boss p. 1 |
2014 | Acrocanthosaurus atokensis Dalman p. 161 |
2014 | Acrocanthosaurus atokensis Hendrickx and Mateus p. 20 |
2014 | Acrocanthosaurus atokensis Xing et al. p. 1653 |
2015 | Acrocanthosaurus atokensis Adams p. 8 |
2015 | Acrocanthosaurus atokensis White et al. p. 3 |
2016 | Acrocanthosaurus atokensis Chiarenza and Cau p. 8 |
2019 | Acrocanthosaurus atokensis Andrzejewski et al. p. 2 |
2019 | Acrocanthosaurus atokensis Senter and Sullivan p. 2 |
2021 | Acrocanthosaurus atokensis Bandeira et al. p. 15 |
2021 | Acrocanthosaurus atokensis Suarez et al. |
2023 | Acrocanthosaurus atokensis Carrano p. 4 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Acrocanthosaurus atokensis Stovall and Langston, Jr. 1950
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Diagnosis
Reference | Diagnosis | |
---|---|---|
J. W. Stovall and W. Langston 1950 | This animal is a carnivorous saurischian of gigantic size and heavy proportions with massive and greatly elongated neural processes. The skull is of massive proportions, and the arcades are moderately heavy; orbits and postoribtal fenestra somewhat reduced; jugular foramen greatly enlarged; frontals and parietals solidly coosified and quadratosquamosal movement somewhat reduced; cervical centra opisthocoelous and of moderate length; pleurocentral cavities deep and well marginated; anterior dorsals distinctly opisthocoelous; medial caudals with supplementary neural processes; chevrons closed proximally by transverse bar, and exhibiting an anterior upward projecting process on each ramus; pelvic elements not coossified; pubis slender with broadly expanded distal termination; ischium straight, slender and elongate, somewhat expanded distally; tibia strongly bowed outward; metatarsal III somewhat constricted proximally by lateral elements. | |
P. J. Currie and K. Carpenter 2000 | Large theropod with elongate neural spines that are more than 2.5 times corresponding presacral, sacral and proximal caudal lengths of the centra. Lacrimal contacts postorbital; supraoccipital expands on either side of the midline to protrude as a double boss behind the nuchal crest; pleurocoelous fossae and foramina pronounced on all presacral and sacral vertebrae; cervical neural spines have triangular anterior processes that insert into depressions beneath overhanging processes on preceding neural spines; accessory transverse processes on mid-caudal vertebrae. | |
M. T. Carrano et al. 2012 | Allosauroid theropod with: (1) absence of nasal extension of antorbital fossa and associated pneumatopores; (2) supraoccipital expanded parasagittally into double boss posterior to nuchal crest (Currie & Carpenter 2000); (3) cervical vertebral neural spines with triangular anterior processes that insert into fossae ventral to overhanging processes on preceding neural spines (Harris 1998a); (4) neural spines of presacral, sacral and anterior caudal vertebrae more than 2.5 times taller than respective centrum lengths (Stovall & Langston 1950); and (5) accessory process on lateral surface of caudal prezygapophysis (Stovall & Langston 1950). |
Measurements
part | N | mean | minimum | maximum | median | s.d. | |
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coracoid height | 1 | 210.0 | - | - | - | - | |
femur circumference | 2 | 406.1 | 388.0 | 425.0 | 406.5 | 26.2 |
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Source: g = genus, o = order | |||||
References: Peczkis 1995, Marsh 1875 |
Age range: base of the Late/Upper Aptian to the top of the Albian or 122.46000 to 100.50000 Ma
Collections (8 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Aptian | USA (Oklahoma) | Acrocanthosaurus atokensis (25147 25148 type locality: 25149) | |
Late/Upper Aptian | USA (Texas) | Acrocanthosaurus atokensis (51709) | |
Late/Upper Aptian | USA (Maryland) | Acrocanthosaurus atokensis (14376) | |
Albian | USA (Arkansas) | Theropoda indet. (222851) | |
Middle Albian - Early/Lower Cenomanian | USA (Wyoming) | Acrocanthosaurus atokensis (50496) Theropoda indet. (50498) |