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  At 12:31 PM 1/9/97 -0500, Aravind wrote:
  >The rauisuchids are confused with a host of other pre- dinosaurian
  >archosaurs. The rauisuchids in my opinion should include the
  >monophyletic assemblage of Rauisuchus, Saurosuchus, Tikisuchus,
  >Fasalosuchus, Ticinosuchus (=Mandasuchus?), Heptasuchus? and possibly
  >Shuvosaurus. Postosuchus which is termed as a rauisuchid is basically a
  >poposaurid. Prestosuchus is also an independent form with nowhere within
  >the monophyletic rauisuchids.
  Parrish's cladistic analysis of crocodylotarsan archosaurs (1993, JVP
  13:287-308) includes in Rauisuchidae Lotosaurus, Fasolasuchus, Rauisuchus,
  and the Kupferzell rauisuchid. Closer to Crocodylomorpha are the
  Poposauridae, containing Poposaurus, Postosuchus, Teratosaurus, and
  Bromsgroveia. The Prestosuchidae (Prestosuchus, Ticinosuchus, and
  Saurosuchus) falls outside a crocodylomorph - poposaurid - rauisuchid -
  I believe Murray and Long have a different formulation for therauisuchid /
  poposaurid / prestosuchid forms, but I don't have a copy of that book yet (I
  know: shame, shame...), so I can't post the details.
  Also, many of these forms were contemporaries (and possibly predators on)
  early dinosaurs, so there are not "pre-dinosaurian".
  Thomas R. Holtz, Jr.
  Vertebrate Paleontologist Webpage: http://www.geol.umd.edu
  Dept. of Geology Email:email@example.com
  University of Maryland Phone:301-405-4084
  College Park, MD 20742 Fax: 301-314-9661
  "To trace that life in its manifold changes through past ages to the present
  is a ... difficult task, but one from which modern science does not shrink.
  In this wide field, every earnest effort will meet with some degree of
  success; every year will add new and important facts; and every generation
  will bring to light some law, in accordance with which ancient life has been
  changed into life as we see it around us to-day."
  --O.C. Marsh, Vice Presidential Address, AAAS, August 30, 1877