where are they preserved now?
UNANSWERABLE
how many years ago was the thescelosaurus in existence? More than 66 million years ago which period was that? Late Cretaceous period describe this creature's physical characteristics. Its size has been estimated in the 2.5–4.0 m range for length, a weight of 200–300 kilograms and it may have been sexually dimorphic, with one sex larger than the other in which region were their fossils discovered? Niobrara County, Wyoming, USA who discovered them? John Bell Hatcher and William H. Utterback were these fossils recovered and preserved somewhere in an institution? Smithsonian Institution's National Museum of Natural History were there any body organs of this creature recovered? Remnants of a four-chambered heart and an aorta but these conclusions have been disputed can you name a few other species from that period you mentioned earlier? Hadrosaurs, ankylosaurs and ceratopsians can you name a few birds which existed during that period? Vegavis, Yungavolucris and Avisaurus can you name a few mammals during that period? Cimolodont, multituberculates, metatherians and eutherians what plants were found during that period? Magnolias, sassafras, roses, redwoods and willows with reference to the first bird mentioned during that period, were their fossils recovered? Yes. On Vega Island, Antarctica where are these fossils preserved? Museo de La Plata, Argentina with reference to the second bird mentioned during that period, where were their fossils recovered? El Brete, Argentina
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Yungavolucris [SEP] Introduction
Yungavolucris is a genus of enantiornithean birds. It contains the single species Yungavolucris brevipedalis, which lived in the Late Cretaceous (Maastrichtian, c.70.6 – 66 mya). The fossil bones were found in the Lecho Formation at "estancia" El Brete, Argentina.""Yungavolucris brevipedalis"" means "Short-footed Yungas bird". The generic name, "Yungavolucris" is after the Yungas region + the Latin "volucris", which translates to "bird" (literally "flyer"). The specific name "brevipedalis" is from the Latin "brevis", which means "short", + "pedalis", from the Latin "pes", meaning "foot".