Saurexallopus
| Saurexallopus Temporal range: Late Cretaceous | |
|---|---|
 | |
| Saurexallopus zerbsti (holotype CU-MWC 224.2) from the Lance Formation | |
Trace fossil classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Clade: | Maniraptora |
| Ichnogenus: | †Saurexallopus Harris, 1997 |
| Type ichnospecies | |
| †Saurexallopus lovei Harris, 1997 | |
| Other species | |
| |
| Synonyms | |
|
Exallopus lovei Harris et al., 1996 | |
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] A 2026 study found the type species of the genus S. lovei as a nomen dubium as they are based on penetrative tracks[8]
See also
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References
[edit]- ↑ 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. doi:10.1006/cres.1996.0024.
- ↑ 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. doi:10.1006/cres.1996.0053.
- ↑ 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.
- ↑ 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.
- ↑ 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.
- ↑ 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.
- ↑ 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.
- ↑ Lallensack, Jens N.; Pérez-Lorente, Félix; Amzil, Mustapha; Oukassou, Mostafa; Meyer, Christian; Saber, Hafid; Klein, Hendrik; Charriére, André; Zafaty, Omar; Falkingham, Peter L. (2026-01-13). "The abundance and diversity of penetrative tracks: a critical re-evaluation of theropod ichnotaxa". Historical Biology: 1–19. doi:10.1080/08912963.2025.2610322. ISSN 0891-2963.
External links
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Media related to Saurexallopus at Wikimedia Commons
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