Saurexallopus

Saurexallopus Temporal range: Late Cretaceous
Saurexallopus zerbsti (holotype CU-MWC 224.2) from the Lance Formation
Trace fossil classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	Theropoda
Clade:	Maniraptora
Ichnogenus:	† Saurexallopus Harris, 1997
Type ichnospecies
†Saurexallopus lovei Harris, 1997
Other species
†S.cordata McCrea et al., 2014 †S.zerbsti Lockley et al., 2004
Synonyms
Exallopus loveiHarris et al., 1996

Saurexallopus (DMNH 2010-07-01) from the Cantwell Formation

Saurexallopus (meaning "reptile different foot") is an ichnogenus of four-toed theropod footprints from the Late Cretaceous period. The type ichnospecies is S. lovei, named and described in 1996 from the Harebell Formation. ^[1] The taxon was originally named Exallopus , but later renamed as Saurexallopus as the former was preoccupied by a polychaete. ^[2] A second species, S.zerbsti, was named and described in 2004 from the Lance Formation. ^[3] In 2012 a four-toed track from the Cantwell Formation was referred to Saurexallopus indet. It was also suggested that Saurexallopus was produced by a therizinosaur taxon. ^[4] In 2013 based on skeletal proportions it was suggested that the ichnotaxon was instead produced by an oviraptorosaur taxon. ^[5] In 2014 a third species was named, S.cordata, from the Wapiti Formation. ^[6] In 2018 several tracks from the Blackhawk Formation were referred to Saurexallopus indet. ^[7]

See also

• Dinosaurs portal
• Paleontology portal

• List of dinosaur ichnogenera

References

1. Harris, J. D.; Johnson, K. R.; Hicks, J.; Tauxe, L. (1996). "Four-toed theropod footprints and a paleomagnetic age from the Whetstone Falls Member of the Harebell Formation (Upper Cretaceous : Maastrichtian), northwestern Wyoming". Cretaceous Research. 17 (4): 381−401. Bibcode:1996CrRes..17..381H. CiteSeerX   10.1.1.590.9821 . doi:10.1006/cres.1996.0024.
2. Harris, J. D. (1997). "Four-toed theropod footprints and a paleomagnetic age from the Whetstone Falls Member of the Harebell Formation (Upper Cretaceous : Maastrichtian), northwestern Wyoming: a correction". Cretaceous Research. 19 (1): 139. Bibcode:1997CrRes..18..139H. CiteSeerX   10.1.1.694.2865 . doi:10.1006/cres.1996.0053.
3. Lockey, M. G.; Nadon, G.; Currie, P. J. (2004). "A Diverse Dinosaur-Bird Footprint Assemblage from the Lance Formation, Upper Cretaceous, Eastern Wyoming: Implications for Ichnotaxonomy" (PDF). Ichnos. 11 (3–4): 229−249. doi:10.1080/10420940490428625.
4. Fiorillo, A. R; Adams, T. L. (2012). "A Therizinosaur Track from the Lower Cantwell Formation (upper Cretaceous) of Denali National Park, Alaska". PALAIOS. 27 (6): 395−400. Bibcode:2012Palai..27..395F. doi:10.2110/palo.2011.p11-083r. S2CID   129517554.
5. Gierlinski, G.; Lockley, M. (2013). "A Trackmaker for Saurexallopus: Ichnological Evidence for Oviraptorosaurian Tracks from the Upper Cretaceous of Western North America". In Titus, A. L.; Loewen, M. A. (eds.). At the Top of the Grand Staircase: The Late Cretaceous of Southern Utah. pp. 526−529.
6. McCrea, R. T.; Buckley, L. G.; Plint, A. G.; Currie, P. J.; Haggart, J. W.; Helm, C. W.; Pemberton, G. S. (2014). "A Review of Vertebrate Track-Bearing Formations from the Mesozoic and Earliest Cenozoic of Western Canada with a Description of a New Theropod Ichnospecies and Reassignment of an Avian Ichnogenus". New Mexico Museum of Natural History and Science Bulletin. 62.
7. Lockley, M.; Gierlinski, G.; Adach, L.; Schumacher, B.; Cart, K. (2018). "Newly Discovered Tetrapod Ichnotaxa from the Upper Cretaceous Blackhawk Formation, Utah". New Mexico Museum of Natural History and Science Bulletin. 79.

External links

• Media related to Saurexallopus at Wikimedia Commons