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Ceratosauria Marsh, 1884 sensu Gauthier 1984
|See Ceratosauria in Wikipedia, the free encyclopedia.|
a)Two pairs of pleurocoels in the cervicals
b)Transverse processes on the dorsal vertebrae are strongly backturned, and triangular in dorsal aspect.
c)The pubic plate is perforated by a large pubic fenestra ventral to the obturator foramen.
d)The sacrum is completely fused, and the sacral ribs are fused to the ilium.
e)The pelvic girdle is fused.
Ceratosauria is among the most fascinating and enigmatic of theropod clades, if for no other reason than their astonishing similarities (in some regards) to ornithurine birds. Holophyly of Ceratosauria has been questioned by several researchers, see Rauhut (1998), Carrano & Sampson (1999), Britt et al (2000) and Paul (2002). While these studies raise valid points, it is the opinion of the author that the characters underwriting ceratosaur holophyly remain compelling.