Lamarqueavis

Lamarqueavis; Temporal range: Late Cretaceous, ; 76.9–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
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
Other species
	†L. minima (Brodkorb, 1963); †L. petra; (Hope, 2002);
Synonyms
	Cimolopteryx minima Brodkorb, 1963; Cimolopteryx petra ; Hope, 2002;

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

^ ^a ^b 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
^ ^a ^b Hope, S. (2002). The Mesozoic radiation of Neornithes. Mesozoic Birds: Above the Heads of Dinosaurs. University of California Press, Berkeley 339-388
^ ^a ^b 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.