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New alvarezsaurid paper
New theropod pdf.
Dan
Restos de Alvarezsauridae (Theropoda, Coelurosauria) en la Formación
Alien (Campaniano-Maastrichtiano), en Salitral Ojo de Agua, Provincia de
Río Negro, Argentina*
*Leonardo Salgado 1 , Rodolfo A. 1 Leonardo Salgado, Rodolfo A. Coria 2
, Andrea B. Coria 2, Andrea B. Arcucci 3 , Luis M. Arcucci 3, Luis M.
Chiappe 4 Chiappe 4
*ABSTRACT. *We present new remains from the Campanian-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 similar age in
Mongolia, and from older sediments (Turonian and Coniacian in age) in
Argentina. Thus, the material presented here extends the temporal record
of the alvarezsaurids from the Southern Hemisphere up to the Latest
Cretaceous. The fossil bones reported were associated to eggshells of
the oofamily Elongatoolithidae, which are actually attributed to Theropoda.
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-71062009000100006&lng=en&nrm=iso&tlng=es