ornithopoda การใช้

• Later cladistic analyses have recovered a basal position in the ( Eu ) ornithopoda.
• To Nopsca, Poposauroidea was one of three suborders that made up the order Ornithopoda.
• A recent analysis by Clint Boyd recovered Thescelosaurids outside Ornithopoda, as the sister taxon to Cerapoda.
• He placed the Stegosauria and Ornithopoda in the Ornithischia, and the Theropoda and Sauropoda in the Saurischia.
• These are today seen as an unnatural ( paraphyletic ) group and " Atlascopcosaurus " is now simply considered a basal member of the Ornithopoda.
• There was a trend towards increasing body size within many dinosaur clades, including the Thyreophora, Ornithopoda, Pachycephalosauria, Ceratopsia, Sauropomorpha, and basal Theropoda.
• For example, O . C . Marsh initially included " Struthiomimus " in the Ornithopoda, a large clade of dinosaurs not closely related to theropods.
• The group articles, such as Sauropoda or Ornithopoda, seem to be less popular for some reason  ditto the ages, Triassic, Jurassic, and Cretaceous.
• Some of these studies have moved some traditional hypsilophodonts out of the Ornithopoda, such as " Agilisaurus " and " Othnielosaurus " ( = " Othnielia " ).
• At the end of the twentieth century it was suggested that it may have been a basal iguanodont; the species are " nomina dubia " and are " incertae sedis " within Ornithopoda.
• Simmons assigned " Tatisaurus " to the Hypsilophodontidae, though this group was seen by him as an evolutionary grade of " primitive " Ornithopoda, ancestral to several ornithischian groups; he felt that " Tatisaurus "'s affinities were with " Scelidosaurus " or the Ankylosauria.