| Lamarqueavis Temporal range: Late Cretaceous,
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Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Clade: | Avialae |
| Family: | †Cimolopterygidae |
| Genus: | †Lamarqueavis Agnolin, 2010 |
| Type species | |
| †Lamarqueavis australis Agnolin, 2010
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| Other species | |
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| Synonyms | |
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Lamarqueavis is an extinct genus of ornithuran dinosaurs from the family Cimolopterygidae known from Late Cretaceous-aged rocks from Argentina, Canada, and the United States. The type species, L. australis, was named in 2010 and is based on the holotype MML 207, a partial right coracoid found in the Allen Formation, Argentina.1 Two other species, L. minima, based on the holotype UCMP 53976, a right coracoid found in the Lance Formation, Wyoming,2 and L. petra, based on the holotype AMNH 21911, a left coracoid also found in the Lance Formation, Wyoming,3 were transferred over from Cimolopteryx to Lamarqueavis in 2010.1 A third unnamed species is known from the Dinosaur Park Formation of Alberta, Canada.3
Lamarqueavis autralis and Lamarqueavis sp. were placed in Cimolopterygidae based on the family's traits; a humeral articular facet that's ventrally oriented, a sternally extended procoracoid process that developed into a thin lamina, and a large ventrally positioned supracoracoid nerve foramen.4 Despite these family traits, they were found to be unique to Lamarqueavis, while not present in Cimolopteryx.4
References
References
- Federico L. Agnolin (2010). "An avian coracoid from the Upper Cretaceous of Patagonia, Argentina". Stvdia Geologica Salmanticensia. 46 (2): 99–119.
- Brodkorb, P. (1963). Birds from the Upper Cretaceous of Wyoming. Proceedings of the XIII International Ornithological Congress 55-70
- Hope, S. (2002). The Mesozoic radiation of Neornithes. Mesozoic Birds: Above the Heads of Dinosaurs. University of California Press, Berkeley 339-388
- Mohr, Sydney R.; Acorn, John H.; Funston, Gregory F.; Currie, Philip J. (2020). "An ornithurine bird coracoid from the Late Cretaceous of Alberta, Canada". Canadian Journal of Earth Sciences. 58 (2): 134–140. doi:10.1139/cjes-2019-0202. ISSN 0008-4077.