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Jingmai K. O?Connor, Luis M. Chiappe, Cheng-ming Chuong, David J. Bottjer and Hailu You
At least two lineages of Mesozoic birds are known to have possessed a distinct feather morphotype for which there is no neornithine (modern) equivalent. The early stepwise evolution of apparently modern feathers occurred within Maniraptora, basal to the ...
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Leonardo Salgado,Rodolfo A. Coria,Andrea B. Arcucci,Luis M. Chiappe
Pág. 67 - 80
We present new remains from the Cam-panian-Maastrichtian beds of the Alien Formation, in Salitral Ojo de Agua (Río Negro, Argentina), which are assignable to Alvarezsauridae indet. This clade of small coelurosaurian theropods is known from strata of simi...
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