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[69], Gregory and Mook in 1925 suggested that Protoceratops was partially aquatic because of its large feetbeing larger than the handsand the very long neural spines found in the caudal (tail) vertebrae. Although it did not have horns, some Protoceratops had a hornlike bump on top of the snout just in front of the eyes. [74], In 2001 Lambert and team upon the description of P. hellenikorhinus also noted variation within individuals. On August 3 several fossils of Protoceratops and Velociraptor were found including a block containing two of them at the Tugriken Shire locality (Djadokhta Formation) during fieldworks of the expedition. (Image credit: CC-BY-SA 4.0) Adorable sheep-sized dinosaurs probably evolved their fancy neck frills to attract mates or show . Juguemos Jurassic VR Dinos on Cardboard y disfrutemos el tiempo de diversin. [22] The authors Brenda J. Chinnery and Jhon R. Horner in 2007 during their description of Cerasinops stated that Bainoceratops, along with other dubious genera, was determined to be either a variant or immature specimen of other genera. Although it lacked the horns of later species, Protoceratops had a distinct bump above its nostrils and thickened bone over its eye sockets. Most of the sacral ribs were fused into the sacrum, and had a rather curved shape. The manus (hand) of Protoceratops had five digits (fingers). The researchers analyzed new, embryo-bearing egg fossils ascribed to the dinosaurs Protoceratops and Mussaurus. Other facies include alluvial (stream-deposited) and eolian (wind-deposited) sediments. This clutch comprises at least 12 eggs and embryos with only 6 embryos preserving nearly complete skeletons. [68], However, in 2011 Lars Schmitz and Ryosuke Motani measured the dimensions of the sclerotic ring and eye socket in fossils specimens of dinosaurs and pterosaurs, as well as some living species. One Protoceratops Species was Named in Honor of a Real-Life Indiana Jones. [77], In 2016 Hone and colleagues analyzed 37 skulls of P. andrewsi, finding that the neck frill of Protoceratops (in both length and width) underwent positive allometry during ontongeny, that is, a faster growth/development of this region than the rest of the animal. [47] The fossilized footprint associated with the specimen ZPAL Mg D-II/3 described by Niedwiedzki in 2012 indicates that Protoceratops was digitigrade, meaning that it walked with its toes supporting the body weight.