sereno
131Sigilmassasaurus — Taxobox name = Sigilmassasaurus fossil range = Late Cretaceous regnum = Animalia phylum = Chordata classis = Sauropsida superordo = Dinosauria ordo = Saurischia subordo = Theropoda unranked familia = Tetanurae familia = Spinosauridae? genus =… …
132Origin of birds — For the book by Gerhard Heilmann, see The Origin of Birds (book). The famous Berlin specimen of Archaeopteryx lithographica The origin of birds is a contentious and central topic within evolutionary biology. A close relationship between birds and …
