|
David Marjanovic wrote-
>Dromaeosaurus has both, birds,
oviraptorosaurs and others have lost number II. However, >AFAIK not much is
published on these bones, apparently they have been of little interest so
>far.
Theropods with a
supradentary/intercoronoid-
Ceratosaurus, Monolophosaurus, Sinraptor,
Allosaurus, Acrocanthosaurus, Tyrannosauridae, Scipionyx, Bagaraatan,
Dromaeosaurus, Velociraptor
Theropods for which no supradentary is
preserved in otherwise complete specimens-
Ornithomimidae, Therizinosauridae, Chirostenotes,
Archaeopteryx, Ornithurae
Theropods with a coronoid-
Dilophosaurus, Carnotaurus, Monolophosaurus,
Sinraptor, Allosaurus, Tyrannosauridae, Caudipteryx?, Oviraptoridae,
Dromaeosaurus, Velociraptor, Bambiraptor
Theropods supposedly lacking a
coronoid-
Ornithomimidae, Therizinosauridae, Chirostenotes,
Shuvuuia, Troodontidae, Archaeopteryx, Gobipteryx, Ornithurae
Now I mainly study theropods, but I've found some
information on other dinosaurs, although it is a bit confusing.
Plateosaurus has a coronoid with a long anterior process that may be a fused
supradentary. Mamenchisaurus sinocanadorum has a supradentary and a
coronoid. Russell and Zheng (1993) state Brachiosaurus also has a
coronoid, although Diplodocus and Nemegtosaurus lack one. Upchurch (1999)
reports Nemegtosaurus and Diplodocus lack intercoronoids, but that they are
present in Camarasaurus and Brachiosaurus. So I'm rather confused about
exactly which is present in neosauropods. Antarctosaurus is supposed to
have an intercoronoid as well. Lesothosaurus has a long element that
starts in the place the coronoid should be and extends to the
symphysis. I think it may be a fused coronoid-supradentary. Sereno
(1991) reports Scelidosaurus and Lycorhinus have similar coronoids(?).
Both Huayangosaurus and Stegosaurus have coronoids. Post-Minmi ankylosaurs
are completely fused, making it difficult to tell which elements are
present. Hypsilophodon, Muttaburrasaurus, Iguanodon and Stegoceras
have coronoids. Chaoyangsaurus and Psittacosaurus lack coronoids
however. Protoceratops and Montanaceratops have both coronoids and
supradentaries.
Mickey Mortimer
|