Patagonia Discovery: 20-Meter Sauropod Upends South American Dinosaur Lineages
A newly identified long-necked sauropod from Patagonia, Bicharracosaurus dionidei, about 20 meters long and dating to the Late Jurassic, blends features of brachiosaurids and diplodocoid relatives, potentially marking the first Jurassic brachiosaurid from South America; found by a shepherd on his farm and now housed in Trelew, the discovery reshapes ideas about sauropod evolution and continental distribution.