A size comparison of various specimens of the theropod dinosaur genus Allosaurus. 

•  Silhouettes are based on Allosaurus skeletal reconstructions by Scott Hartman [2] and Henrique Paes [3], used with permission. I, the author, require that Scott Hartman, Henrique Paes and  steveoc 86 at Wikimedia Commons get attribution.•  AMNH 4734, DINO 2560 (UUVP 6000), and MOR 693 are scaled using the scale bars in their respective reconstructions. The average size of adult Allosaurus fragilis specimens are estimated at ~8.5 m [1].  DINO 11541 is based on figures 3 and 4 in Chure et al. (2020). Allosaurus europaeus, ML 415, is scaled to ~7 m based on an estimate by Greg Paul,[2] the skull scaled based on figure 16 in Chure et al. (2020). SMA 0005 silhouette based on Fig 1 in Foth et al. (2013) with some details from images of the mount online, scaled to about 7.6 m.[3][4]
• The holotype of Allosaurus fragilis YPM 1930 is considered undiagnostic, and because of this, a more complete specimen from the same quarry, AMNH 4734, was proposed as a neotype for the species.[5][6] DINO 2560 is often referred to Allosaurus fragilis. In 2020, Allosaurus jimmadseni was described with DINO 11541 designated the holotype, SMA 0005 and MOR 693 were referred to the species.[7]Allosaurus europaeus, ML 415,  is only known from one fragmentary specimen consisting of a partial skull, ribs and a few cervical vertebrae;[8] the silhouette above  hypothetical should be viewed with caution.
• Fragmentary allosaur material, which was named Epanterias, may belong to Allosaurus suggesting the genus could grow larger. Epanterias has been estimated 12 to 13 m.[9][10][11] A large allosaurid Saurophaganax is also considered a species of Allosaurus by some researchers (Allosaurus maximus).[12][2]
• Humans are scaled to 170 cm (5 ft 7 in) and 160 cm (5 ft 3 in).NOTE: I often update my images. If you want to post any of my images on a website, please (if possible) don’t host/save it to the website server. I’d prefer it if the image's Wikimedia URL is used or a link to the original provided. Thanks. 

References

↑ Glut, Donald F. (1997) "Allosaurus" in     Dinosaurs: The Encyclopedia, Jefferson:  McFarland &amp; Co, pp. 105–117  ISBN:  0-89950-917-7. 

↑ a b “Dinosaurs”, in The Princeton Field Guide to Dinosaurs[1], Princeton University Press, 2011-12-31, ISBN 978-1-4008-3615-4, pages 67–67

↑ Foth, Christian (2015-05-12). "New insights into the lifestyle of Allosaurus (Dinosauria: Theropoda) based on another specimen with multiple pathologies". PeerJ 3: e940. DOI:10.7717/peerj.940. ISSN 2167-8359.

↑ Allosaurus sp. BIG AL TWO Skeleton - Fossil Replica. www.bhigr.com. Retrieved on 2020-02-03.

↑ Paul, Gregory S. (2010). "Case 3506 Allosaurus Marsh, 1877 (Dinosauria, Theropoda): proposed conservation of usage by designation of a neotype for its type species Allosaurus fragilis Marsh, 1877". The Bulletin of Zoological Nomenclature 67 (1): 53–56. DOI:10.21805/bzn.v67i1.a7. ISSN 0007-5167.

↑ Carrano, Matthew T. (2018-05-31). "Comment (Case 3506) — Conservation of Allosaurus Marsh, 1877 (Dinosauria, Theropoda): additional data in support of the proposed neotype for its type species Allosaurus fragilis Marsh, 1877". The Bulletin of Zoological Nomenclature 75 (1): 59. DOI:10.21805/bzn.v75.a014. ISSN 0007-5167.

↑ Chure, Daniel J. (2020-01-24). "Cranial anatomy of Allosaurus jimmadseni, a new species from the lower part of the Morrison Formation (Upper Jurassic) of Western North America". PeerJ 8: e7803. DOI:10.7717/peerj.7803. ISSN 2167-8359.

↑ Mateus, Octávio Walen, Aart        The large theropod fauna of the Lourinha Formation (Portugal) and its similarity to that of the Morrison Formation, with a description of a new species of allosaurus  OCLC:   1117611182. 

↑  Holtz, Thomas R., Jr. (2004)   Weishampel, David B. , ed.    The Dinosauria (2nd ed.), Berkeley:  University of California Press, pp. 71–110  ISBN:  0-520-24209-2. 

↑ Mortimer, Mickey (2003-07-21). And the largest Theropod is.... The Dinosaur Mailing List. Retrieved on 2007-09-08.

↑ Madsen, James H., Jr. (1993) [1976]       Allosaurus fragilis: A Revised Osteology, Utah Geological Survey Bulletin 109 (2nd ed.), Salt Lake City:  Utah Geological Survey  

↑ Smith, David K. (1998-04-10). "A morphometric analysis ofAllosaurus". Journal of Vertebrate Paleontology 18 (1): 126–142. DOI:10.1080/02724634.1998.10011039. ISSN 0272-4634.
File:Allosaurus size comparison.svg is an altered version of an image by User:Marmelad which inturn is a vectorized version of an image by User:Dropzink (seen to the right)
Steveoc 86 Marmelad Scott Hartman, [4], Henrique Paes [5].