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     Dr. Rainforth indicated the probable ornithiscian Trisauropodiscus is known from the Stromberg Triassic and the early Jurassic of the SW US.  That, and the apparent absence of NA Triassic prosauropods, suggests dinosaur diversity may have been higher in the Late Triassic than is generally thought, or global migration occurred around the Tr-J boundary.  Does Trisauropodiscus occur throughout the Stromberg Triassic, or only near the Tr-J?