| "Coelosaurus" antiquus Temporal range: Late Cretaceous,
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|---|---|
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| Holotype tibia | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Clade: | †Ornithomimosauria |
| Family: | †Ornithomimidae |
| Species: | †"Coelosaurus" antiquus |
| Binomial name | |
| "Coelosaurus" antiquus | |
| Synonyms | |
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"Coelosaurus" antiquus ("antique hollow lizard") is a dubious species of theropod dinosaurs. It was named by Joseph Leidy in 1865 for two tibiae found in the Navesink Formation of New Jersey.
This species was later reclassified as a member of the genus Ornithomimus in 1979 by Donald Baird and John R. Horner as Ornithomimus antiquus,[1] and this was followed by some later researchers.[2] However, others have not followed this classification, and have noted that there is no justification for the classification of the New Jersey specimens in a genus known only from western North America. David Weishampel in 2004 considered "C." antiquus to be indeterminate among ornithomimosaurs, and therefore a nomen dubium.[3]
In 1979, Baird and Horner discovered that the name "Coelosaurus" was preoccupied by another dubious taxon (based on a single vertebra), named Coelosaurus by an anonymous author now known to be Richard Owen in 1854.[3]
Ornithomimid material known from the Severn Formation of Maryland and the Mooreville Chalk and Blufftown formations of Alabama and Georgia have also been assigned to this species.[4] A specimen once assigned to Coelosaurus that was discovered in the Merchantville Formation of Delaware during the 1970s has since been assigned to "Cryptotyrannus".[5]
- ^ Baird D., and Horner, J., (1979), "Cretaceous dinosaurs of North Carolina", Brimleyana 2: 1–28
- ^ Sullivan, (1997). "A juvenile Ornithomimus antiquus (Dinosauria: Theropoda: Ornithomimosauria), from the Upper Cretaceous Kirtland Formation (De-na-zin Member), San Juan Basin, New Mexico." New Mexico Geological Society Guidebook, 48th Field Conference, Mesozoic Geology and Paleontology of the Four Corners Region. 249–254.
- ^ a b Weishampel, D.B. (2004). "Another Look at the Dinosaurs of the East Coast of North America. En (Colectivo Arqueológico-Paleontológico Salense, Ed.). Archived 2012-09-04 at the Wayback Machine" Actas de las III Jornadas sobre Dinosaurios y su Entorno. 129–168. Salas de los Infantes, Burgos, España.
- ^ Brownstein, Chase D. (2018-02-08). "The biogeography and ecology of the Cretaceous non-avian dinosaurs of Appalachia". Palaeontologia Electronica. 21 (1): 1–56. doi:10.26879/801. ISSN 1094-8074.
- ^ Doran Brownstein, Chase (2021). "Dinosaurs from the Santonian–Campanian Atlantic coastline substantiate phylogenetic signatures of vicariance in Cretaceous North America". Royal Society Open Science. 8 (8): 210127. Bibcode:2021RSOS....810127D. doi:10.1098/rsos.210127. ISSN 2054-5703. PMC 8385347. PMID 34457333.