Dinosauromorpha

From Palaeos

Jump to: navigation, search
Parent taxa:
(check the following menu and phylogeny - the taxon in bold refers to the topic on this page)


ARCHOSAUROMORPHA - Archosauromorpha, Archosauria (clade), Thecodontia (grade)
Taxonomy Phylogeny 
o Sauria
|--Lepidosauromorpha
`--o Archosauromorpha
   |?--Choristodera
   `--+--Rhynchosauria
      `--+--Trilophosauridae
         `--+--Prolacertiformes
            `--o--Proterosuchidae 
               `--+--Erythrosuchidae
                  `--+--Euparkeriidae
                     `--o--Proterochampsidae
                        `--o Archosauria
                           |--o Ornithodira
                           |  |--Pterosauria
                           |  `--Dinosauromorpha
                           `--Crurotarsi

Archosauromorpha topics: | Archosauromorpha Characteristics | Ecology | Evolutionary History | Archosauriformes | Archosauria | "Thecodontia" | References | Links



Dinosauromorpha




<--- Picture goes here --->



Contents

[edit] Information

Dinosauromorpha: Avipes? Birds > pterosaurs.

Range: from the Middle Triassic.

[edit] Characters

This page needs to be wikified. At its simplest, wikifying can just mean adding links to other pages via the edit tab. For help in editing Palaeos org pages, see the edit help page
  • Primitively, elongated rostrum and numerous small, serrated teeth on jaws.
  • Cervical column with a strong sigmoid curve.
  • Dermal scutes on dorsal midline.
  • Long legs with forelimb being 50% or less of hind limb length.
  • Hind-limb carried close to axis of body.
  • Inturned femoral head.
  • Advanced mesotarsal hinge with joint between astragalus-calcaneum unit and rest of foot.
  • $ Astragalus with acute anteromedial corner.
  • $ Articular surface of calcaneum for distal tarsals less than 35% of corresponding astragalar articular surface.
  • $ Articular facet on distal tarsal 4 for metatarsal V reduced.
  • "Hooked" metatarsal V absent.
  • $ Metatarsals I & V narrower than II-IV.
  • Probably habitually bipedal.

NB: See image at Ornithodira. This image shows the primitive state. A dinosauromorph would lack the "hook" on metatarsal V, the calcaneum would be smaller relative to the astragalus, the astragalus would have a sharp corner on the lower left, and so on.


(The following menu and phylogeny refers to subtopics of this page)


DINOSAUROMORPHA
Taxonomy Phylogeny - note that many of these early forms are scrappy and their relationships poorly known 
o Ornithodira
|--Pterosauria
`--o DINOSAUROMORPHA
   |--Lagerpeton
   `--o Dinosauriformes
      |--Lagosuchus (Lagosuchidae)
      `--+?-Pseudolagosuchus (Lewisuchidae)
         `--+?-Teyuwasu
            |?-Silesaurus
            `--+?-Herrerasauria (or Saurischia/Theropoda)
               `--+?-Agnostiphitys
                  `--o Dinosauria
                     |--Ornithischia
                     `--Saurischia


[edit] Links

The following section is in html (web page) format and needs to be converted to wiki markup. This involves removing the html tags and replacing them with wiki tags. For help in editing Palaeos org pages, see the edit help page

[edit] References

Arcucci (1997); Fastovsky & Weishampel (1996); Novas (1996); White (2001).


[edit] Credits

Palaeos com ATW050828. This page MAK061024

Retrieved from "http://www.palaeos.org/Dinosauromorpha"
Personal tools