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saurischian |
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saurischianAny “lizard-hipped” dinosaur species (order Saurischia), with hip bones arranged like those of modern reptiles, the pubis bone pointed forward and down. The order includes all carnivorous and some giant herbivorous dinosaurs. Saurischians evolved from small bipedal dinosaurs called thecodonts; they first appeared in the Late Triassic epoch (227–206 million years ago). The order consists of three suborders: theropods, sauropods, and staurikosaurs (suborder Staurikosauria). Staurikosaurs, known only from the incomplete remains of a few species, seem to have been medium-sized flesh-eaters similar to the theropods. See also ornithischian. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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For example, among the 12 major vertebrate clades, extinctions were concentrated in seven of them; sharks, ornithischians, pterosaurus, saurischians, non-trilasghemic mammals, lizards, and marsupials accounted for about 75% of the extinctions (4). The two researchers showed that some saurischians and ornithischians had remarkably similar joints, indicating that the earliest members of these two lineages had sprung from one line of animals that bore features common to both groups. |
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