dinosauria (saurischia model) - geologygeol.umd.edu/~tholtz/g104/handouts/104dinosauria.pdf ·...

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Silesauridae Sauropodomorpha Theropoda SAURISCHIA DINOSAURIA Ornithischia Neornithischia Elongate Deltopectoral Crest on Humerus; Semioppos- able Manual Digit I; Reduced Manual Digits IV & V; Open (perforate) Acetabulum; Potential for fuzzy integument? DINOSAURIA (Saurischia model) Marginocephalia Ornithopoda Thyreophora Skeletons by Scott Hartman (skeletaldrawing.com) Dracohors Special Articulations (hypo- sphene-hypantrum) in dorsal verte- brae; Elongated Neck; Hollow air sac chambers in cervicals; Meta- carpal I reduced; Enlarged thumb claw; Manual Digit II longest in the manus

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Silesauridae

Sauropodomorpha Theropoda

SAURISCHIA

DINOSAURIA

Ornithischia

Neornithischia

Elongate Deltopectoral Crest on Humerus; Semioppos-able Manual Digit I; Reduced Manual Digits IV & V; Open (perforate) Acetabulum; Potential for fuzzy integument?

DINOSAURIA (Saurischia model)

Marginocephalia Ornithopoda

Thyreophora

Skeletons by Scott Hartman (skeletaldrawing.com)

Dracohors

Special Articulations (hypo-sphene-hypantrum) in dorsal verte-brae; Elongated Neck; Hollow air sac chambers in cervicals; Meta-carpal I reduced; Enlarged thumb claw; Manual Digit II longest in the manus