Annals of the South African MuseumAnnale van die Suid-Afrikaanse Museum . e skeletal anatomy of prosauropods is remarkably uniform, so taxashould be based on specimens which include either most of the specimen orbones which are diagnostically different from those of other of the limited number of skeletal variations it is necessary to diagnosetaxa on the basis of a combination of characters which, if each was taken inisolation, would not be diagnostic. Unfortunately several of the taxa listed bySteel (1970) are based on specimens which are generically and specificallyindet

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Annals of the South African MuseumAnnale van die Suid-Afrikaanse Museum . e skeletal anatomy of prosauropods is remarkably uniform, so taxashould be based on specimens which include either most of the specimen orbones which are diagnostically different from those of other of the limited number of skeletal variations it is necessary to diagnosetaxa on the basis of a combination of characters which, if each was taken inisolation, would not be diagnostic. Unfortunately several of the taxa listed bySteel (1970) are based on specimens which are generically and specificallyindeterminate. 3. The group has been over-classified and insufficient account has beentaken of the range of individual variation possible within a dinosaurian species;this can be quite extensive, as shown by the prosauropod Lufengosaurus hueneiYoung (see Rozhdestvensky 1966) and the ornithopod Hypsilophodon foxiiHuxley (see Galton 1974). 4. A few of the taxa included within the family are not prosauropods. ANCH1SAURUS CAPENSIS (BROOM) AND A REVISION OF THE ANCHISAURIDAE 123.

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