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> What does Saurischia sedis mutabilis mean?
sedis mutabilis = of changing position
So, Saurischia sedis mutabilis means that it is within the Saurischia, but
not certain as to closer to Sauropodomorpha or to Theropoda.
(And Alxasaurus has helped to show that therizinosauroids are not of
changing position, but are REALLY derived coelurosaurs).
Thomas R. Holtz, Jr. Phone: 703-648-5280
Vertebrate Paleontologist Fax: 703-648-5420
email@example.com ------------> firstname.lastname@example.org
U.S. Geological Survey -------------> University of Maryland
Branch of Paleontology & Stratigraphy ----> Department of Geology
MS 970 National Center
Reston, VA 22092 -------------> College Park, MD 20742