Lamarqueavis fossil map
Where fossils of Lamarqueavis have been found, shown on the Earth as it looked about 66 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 66 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →
| Group | Prehistoric birds |
|---|---|
| Lived | 72.2–66 million years ago (Maastrichtian) |
| Periods | Cretaceous |
| Family | Cimolopterygidae |
| Named by | Agnolin 2010 |
| Fossil records | 3 occurrences at 3 locations (PBDB) |
| Found in | United States, Argentina |
| Rock formations | Lance, Allen |
About Lamarqueavis
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. Two other species, L. minima, based on the holotype UCMP 53976, a right coracoid found in the Lance Formation, Wyoming, and L. petra, based on the holotype AMNH 21911, a left coracoid also found in the Lance Formation, Wyoming, were transferred over from Cimolopteryx to Lamarqueavis in 2010. A third unnamed species is known from the Dinosaur Park Formation of Alberta, Canada.
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. Despite these family traits, they were found to be unique to Lamarqueavis, while not present in Cimolopteryx.
Text in “About” is quoted from the Wikipedia article Lamarqueavis (revision 1321391595), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 23 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q61893449.
