Extinct genus of birds
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Intiornis (meaning "Inti bird", the binominal naming means "Unexpected Sun bird") is an extinct genus of avisaurid enantiornithean birds which existed in what is now North-West Argentina during the late Cretaceous period (Campanian age). 
Description.
The genus is known from a partial hind limb found in beds of the Upper Cretaceous Las Curtiembres Formation. Three primary toes on a limb of "Intiornis" are nearly the same length. It was named by Fernando Emilio Novas, Federico Lisandro Agnolín and Carlos Agustín Scanferla in 2010, and the type species is "Intiornis inexpectatus". With the body length of around "Intiornis" was the size of a sparrow, thus representing the smallest enantiornithes known from South America. Its closest relative was "Soroavisaurus" from the Lecho Formation (Maastrichtian age) of northwestern Argentina.
Phylogeny.
The cladogram below is from Wang "et al.", 2022:
Key to letters:
"b" = "Boluochia" ;br ;
"c" = "Cathayornis" ;br ;
"e" = "Enantiophoenix" ;br ;
"f" = "Houornis" ;br ;
"h" = "Longipteryx" ;br ;
"i" = "Parabohaiornis" ;br ;
"j" = "Pterygornis" ;br ;
"l" = "Vorona" ;br ;
"m" = "Yuanjiawaornis" ;br ;
"n" = "Yungavolucris"
Paleobiology.
Long toes of equal length and large curved claws suggest adaptability for perching.
References.
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