Sulcavis

Sulcavis is a genus of enantiornithean birds. One species is named, Sulcavis geeorum. The fossil was found in Early Cretaceous (121-125 million years ago) rocks in Liaoning Province, China.

Sulcavis
Temporal range: Early Cretaceous, , 125–121 Ma
Sulcavis skull.png
Fossil skull
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: Theropoda
Clade: Enantiornithes
Family: Bohaiornithidae
Genus: Sulcavis
O’Connor et al., 2013
Type species
Sulcavis geeorum
O’Connor et al., 2013

Sulcavis is the first discovery of a bird with ornamented tooth enamel. The enantiornitheans are unique among birds in showing minimal tooth reduction and a diversity of dental patterns. Sulcavis had robust teeth with grooves on the inside surface, which likely strengthened the teeth against harder food items. No previous bird species have preserved ridges, striations, serrated edges, or any other form of dental ornamentation.[1]

DiscoveryEdit

The holotype of Sulcavis, BMNH Ph-000805, is discovered near the town of Lamadong, in Liaoning Province, China. The fossil was found in the Yixian Formation, an Early Cretaceous rock formation. . The genus was described on January 9, 2013 in an article that was published in the Journal of Vertebrate Paleontology by Jingmai Kathleen O'Connor, Yuguang Zhang, Luis Maria Chiappe, Qingjin Meng, Li Quanguo and Liu Di.

The type species of the new genus was named Sulcavis geeorum by the team of scientists. De genus name comes from the Latin words "sulcus" (groove) and "avis" (bird), reflecting the unusual dental characteristics of the genus. The species name is to honour the Gee family from La Cañada (US) "because of their generous contributions to the research of Mesozoic birds".[1] The holotype of Sulcavis geeorum was prepared by Maureen Walsh at the Natural History Museum of Los Angeles County, USA.

PhylogenyEdit

The cladogram below follows O’Connor et al., 2013 phylogenetic analysis.[1]

Pygostylia 

Confuciusornithiformes

Omnivoropterygiformes

Ornithothoraces 

Euornithes

Enantiornithes 

Protopteryx fengningensis

Elsornis keni

Longipterygidae 

Boluochia zhengi

Longipteryx chaoyangensis

Longirostravisidae 

Eocathayornis walkeri

Rapaxavis pani

Longirostravis hani

Shanweiniao cooperorum

Shenqiornis mengi

Iberomesornis romerali

Otogornis genghisi

Sulcavis geeorum

Pengornis houi

Neuquenornis volans

Gobipterygidae 

Gobipteryx minuta

Vescornis hebeiensis

Eoenantiornis buhleri

Eoalulavis hoyasi

Liaoningornis longidigitris

Cathayornis

Concornis lacustris

ReferencesEdit

  1. ^ a b c O’Connor, J. K.; Zhang, Y.; Chiappe, L. M.; Meng, Q.; Quanguo, L.; Di, L. (2013). "A new enantiornithine from the Yixian Formation with the first recognized avian enamel specialization". Journal of Vertebrate Paleontology. 33: 1. doi:10.1080/02724634.2012.719176.