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Use "ornithischians" in a sentence
"Matt: the lack of ornithischians is, I'm afraid, a quirk."
"Must ask, though, if only to rib you: do you have any posts that are primarily on ornithischians?"
"Statistical comparisons were made among osteichthyans using ganoid scales, caudates using vertebrae, ornithischians using teeth, and testudinates using shell fragments."