C. The Ornithischian Dinosaur Psittacosaurus from the Lower Cretaceous of Asia and the Relationships of the Ceratopsia (Columbia University, 1987). 27. Ji, S. Initial report of fossil psittacosaurid skin impression from the uppermost Jurassic of Sihetun, northeastern China. Earth Sci. 53,...
surrounded by five or six small triangular elements (\(\bar{x}\)length = 0.4 mm). This arrangement recalls a hexagram, or 6-pointed star (Fig.3c). Each “star” closely abuts its neighbor so that the pattern is continuous across this region. This unusual pattern is also present...