Primobucco

{{Short description|Extinct genus of birds}}

{{Automatic taxobox

| fossil_range = Eocene

| image = Primobucco mcgrewi USNM PAL 336284 img1.jpg

| taxon = Primobucco

| authority = Brodkorb, 1970

| type_species = Primobucco mcgrewi

}}

Primobucco is an extinct genus of bird placed in its own family, Primobucconidae.

The type species, Primobucco mcgrewi, lived during the Lower Eocene of North America. It was initially described by American paleo-ornithologist Pierce Brodkorb in 1970, from a fossil right wing, and thought to be an early puffbird.{{cite journal|last=Brodkorb|first=Pierce|date=1970|title=An Eocene Puffbird from Wyoming|journal=Rocky Mountain Geology|volume=9|issue=1|pages=13–15|url=http://rmg.geoscienceworld.org/content/9/1/13.extract|access-date=2014-12-09|archive-url=https://web.archive.org/web/20160807191843/http://rmg.geoscienceworld.org/content/9/1/13.extract|archive-date=2016-08-07|url-status=dead}} However, the discovery of a further 12 fossils in 2010 indicate that it is instead an early type of roller.{{cite journal |author1=Ksepka, Daniel T. |author2=Clarke, Julia A. |title= Primobucco mcgrewi (Aves: Coracii) from the Eocene Green River Formation: New Anatomical Data from the Earliest Constrained Record of Stem Rollers |journal=Journal of Vertebrate Paleontology| volume=30|issue= 1 |year=2010 |pages=215–25|doi=10.1080/02724630903412414|bibcode=2010JVPal..30..215K |doi-access=free}}

Related fossils from the European Messel deposits have been assigned to the two species P. perneri and P. frugilegus. Two specimens of P. frugilegus have been found with seeds in the area of their digestive tract, which suggests that these birds were more omnivorous than the exclusively predaceous modern rollers.