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Topic: Saurischia

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Bill Jones

	Encyclopedia: Saurischia
		Orders Saurischia Sauropodomorpha Theropoda Ornithischia Dinosaurs are giant reptiles that dominated the terrestrial ecosystem for most of their 165-million year existence.
		Dinosaurs are divided into two major groups, the Saurischia and the Ornithischia, on the basis of hip structure.
		Saurischia - extinct terrestrial reptiles: theropods (carnivorous); sauropods (herbivorous)
	www.nationmaster.com /encyclopedia/Saurischia (1371 words)

	Dinosaur - Wikipedia, the free encyclopedia
		Saurischia is defined as all taxa sharing a more recent common ancestor with birds than with Ornithischia.
		Some of these are commonly, but incorrectly, thought of as dinosaurs, including plesiosaurs (which are not closely related to the dinosaurs) and pterosaurs, which developed separately from reptilian ancestors in the late Triassic period.
		Dinosaurs are divided into two orders, the Saurischia and the Ornithischia, on the basis of their hip structure.
	en.wikipedia.org /wiki/Dinosaurs (6887 words)

	Saurischia -- Britannica Student Encyclopedia
		One of the two major orders of dinosaurs, the Saurischia were those dinosaurs whose pelvic structure resembled that of modern lizards.
		The Saurischia were a particularly diverse group; the order includes both carnivorous and herbivorous dinosaurs...
		It is among the oldest known dinosaurs and is an ancestor of larger theropods, such as Tyrannosaurus rex.
	www.britannica.com /ebi/article-9390694 (625 words)

	Palaeos Vertebrates: 310.100 Dinosauromorpha
		Saurischia: All dinosaurs closer to birds than to Triceratops.
		Introduction: The Saurischia or "lizard hipped" dinosaurs are conventionally divided in turn into two groups, one carnivorous, the other herbivorous.
		The other group of Saurischia, the Sauropodomorpha, are the herbivores.
	www.palaeos.com /Vertebrates/Units/Unit310/100.html (1242 words)

	AccessScience @ McGraw-Hill - Dinosaur Sample Page
		Saurischia, including the carnivorous Theropoda and the giant, long-necked Sauropoda, retained the generalized reptilian hip structure in which the pubis points down and forward and the ischium points down and backward.
		Even within Saurischia, there were general doubts that Sauropoda and Theropoda had any close relationship; and eventually the word "dinosaur" was mainly used informally by paleontologists.
		In 1974 it was argued that there were a great many unique features, including warm-bloodedness, that diagnosed the dinosaurs as a natural group, including their descendants the birds.
	web10.eppg.com /accessscience/dinosaur.html (507 words)

	Research Starters: Dinosaurs
		The Saurischia were dinosaurs with hipbones similar to those of modern crocodiles.
		The fiercest dinosaurs were the therapods, two-legged, flesh-eating members of the Saurischia.
		Based on their study of fossils, scientists have been able to classify dinosaurs into two main groups, the Saurischia ("lizard hips") and the Ornithischia ("bird hips").
	teacher.scholastic.com /researchtools/researchstarters/dinosaur (623 words)

	Superorder Dinosauria
		Traditionally, dinosaurs were considered as reptiles because of the type of openings in their skulls and the structure of their pelvis.
		The apomorphies (derived characteristics) defining the Saurischia are a grasping forefoot with strongly offset thumb and second finger the longest, and the long flexible S-shaped neck.
		The forefoot is distinctive in primitive saurischians, but highly modified in more derived taxa such as sauropods (where they have become elephant-like) and — possibly — birds (where they may have become wings; read more).
	www.peripatus.gen.nz /Taxa/Chordata/Dinosauria.html (1706 words)

	Saurischians bibliography
		Currie, P. J., 1985, Cranial anatomy of Stenonychosaurus inequalis (Saurischia, Theropoda) and its bearing on the origin of birds: Canadian Journal of Earth Sciences, v.
		Padian, K., 1986, On the type material of Coelophysis Cope (Saurischia: Theropoda) and a new specimen from the Petrified Forest of Arizona (Late Triassic: Chinle Formation), in Padian, K., ed., The Beginning of the Age of Dinosaurs: Cambridge, Cambridge University Press, p.
		Raath, M. A., 1977, The anatomy of the Triassic theropod Syntarsus rhodesiensis (Saurischia: Podokesauridae) and a consideration of its biology [PhD dissert.]: Rhodes University, Salisbury.
	www.talkorigins.org /origins/biblio/saurischians.html (321 words)

	DinoDatabase.com :: Glossary \| S
		Saurischia (sawr-RIS-kee-ah) is one of the two orders of animals called dinosaurs.
		Saurischia is divided into two suborders: 1: Sauropodomorpha -- Basically quadrupedal and herbivorous.
		Segnosauridae (seg-noh-SAWR-ih-day) is a new family of Late Cretaceous dinosaurs recently found in Mongolia.
	www.dinodatabase.com /gloss/DNOGLOSS.asp (1201 words)

	Lecture 13
		The Saurischia comprise the dinosaurs with the shared derived character of a hand in which digit 1 is enlarged and twisted so that the hand becomes one that can grasp.
		The Saurischia are the so-called "lizard-hipped" dinosaurs because most saurischian groups retain the forward pointing pubis seen in more primitive archosaurian.
		The Saurischia is split into two groups: the Sauropodomorpha and the Theropoda.
	rainbow.ldeo.columbia.edu /courses/v1001/was11.html (1651 words)

	Palaeos Vertebrates 310.000 Dinosauromorpha Overview
		Those that had a reptilian-like pelvic bone were put in the Order Saurischia or "lizard-hips"; while the ones with a bird-like pelvic bone made up the Order Ornithischia or "bird-hips".
		There is however a rival theory which derives the pterosaurs from prolacertiform "lizards," or perhaps even more distantly related stock.
		The Saurischia or "lizard hipped" dinosaurs are those more closely related to birds than to Triceratops.
	www.palaeos.com /Vertebrates/Units/Unit310/000.html (1348 words)

	All About Hadrosaurs
		The Saurischia, or lizard-hipped, and the Ornithischia, or bird-hipped.
		The Saurischia species dominated during the Triassic Period, then the Ornithischia dominated later in the Cretaceous Period.
		The Saurischia include two suborders: Sauropoda, or reptile-footed, and the Theropoda, or beast-footed.
	www.nps.gov /akso/ParkWise/Students/ReferenceLibrary/Paleontology/Hadrosaurs.htm (1170 words)

	Dinosauria Defined
		Gauthier (1986) formally defined "Saurischia" as birds and all taxa closer to birds than to Ornithischia.
		Since Saurischia is the same thing as Dinosauria, because ornithischians descended from certain primitive saurischians, this definition is vacant.
		Or, to go to the paper by Holtz and Padian at last year's SVP meeting, _Eoraptor_ and Herrerasauridae are dinosaurs only if they are shown (by the most parsimonious distribution of derived characters) to fall within the clade joining Ornithischia and Saurischia (or _Triceratops_ and birds, or _Iguanodon_ and _Megalosaurus_ informally).
	www.dinosauria.com /jdp/dino/dinosaur.htm (784 words)

	Desert Dinosaurs (DesertUSA)
		Dinosaurs were the dominant land animals on the planet throughout the Mesozoic Era (from 245 to 65 million years ago) but became extinct at its close.
		Throughout all the North American desert regions, which during the Mesozoic Era, changed from a tropical climate, when the continent was near the equator, to more temperate and arid climates.
		Today, many experts agree that birds are the direct descendants of the Theropoda group of dinosaurs.
	www.desertusa.com /mag98/dec/papr/dinos.html (1200 words)

	What groups of dinosaurs existed?
		Since the earliest days of dinosaur palaeontology, dinosaurs have been split into two very broad groups - the Saurischia and Ornithischia (meaning lizard-hipped and bird-hipped respectively.) Indeed for some time it was believed that these two groups had no common ancestor, so that the term ``dinosaur'' was not a taxonomically sound one.
		Some people now hold that the two main divisions within Saurischia - the Sauropoda and Theropoda - are actually separate suborders, yielding a three-fold division; while others would now classify the sauropods together with the Ornithischia in a grouping called Phytodinosauria, meaning ``plant(-eating) dinosaurs''.
		New theories notwithstanding, current orthodoxy has two main groupings in the Saurischia: the sauropods are the largest of all dinosaurs, with heavy bodies and long necks and tails; and the theropods are the bipedal meat-eaters.
	www.miketaylor.org.uk /dino/faq/s-class/overview (3381 words)

	Saurischia (Site not responding. Last check: 2007-11-05)
		Chinsamy, A. Physiological implications of the bone histology of Syntarsus rhodesiensis (Saurischia: Theropoda).
		Los Saurischia, también llamados saurisquios, perteneciente al superorden Dinosauria, se distigen por presentar caderas lacertiformes, en las que el hueso púbico apunta hacia delante, es decir, la pelvis, en visión lateral, tiene forma triangular.
		The braincase of a small sauropod dinosaur (Reptilia, Saurischia) from the Upper Cretaceous Lameta Group, central India,...
	enciclopedia.cc /Saurischia (258 words)

	Saurischia - Webled.com
		...we found 1 entry for the meaning of saurischia..
		...Saurischia, saurischian, saurischian dinosaur, Sauropodomorpha, subclass Archosauria.....Saurischia explanation.
		Definition of Saurischia is provided by 1913 Webster's Dictionary, WordNet Lexical Database, Dictionary.....Saurischia..
	www.webled.com /Saurischia.htm (246 words)

	Dinosauria
		These creatures, previously considered Ornithosuchian thecodonts, are not even formally considered dinosaurs (although they could be called "dinosauromorphs", which means dinosaurs and a few related ancestral forms).
		The Saurischia or "lizard hipped" dinosaurs are conventionally divided in turn into two groups, one carnivorous, the other herbivorous.
		The other group of Saurischia, the Sauropodamorpha, are the herbivores.
	www.kheper.net /evolution/dinosauria/Dinosauria.htm (1841 words)

	National Museum of Natural History - Dinosaur Exhibits (Site not responding. Last check: 2007-11-05)
		The Saurischia were dominant in the Triassic Period (about 245 million-210 million years ago) and the Jurassic Period (about 210 million-145 million years ago).
		The Ornithischia dominated in the Cretaceous Period (about 145 million-65 million years ago).
		Saurischia and Ornithischia further branch into seven subgroups, based on such distinctive features as body appearance and eating behavior.
	www.nmnh.si.edu /paleo/dino/bodystyl.htm (142 words)

	Lec 6 Origin of Dinosauria
		Seeley divided the dinosaurs into two major groups based on their pelvic structure: the Saurischia (lizard hipped dinosaurs) and the Ornithischia (bird hipped dinosaurs).
		In fact, it was believed that Ornithischia, Saurischia, Pterosauria, and Crocodylia arose independently from the "Thecondontia" (Modern dinosaur paleontologists do not recognize the Thecodontia because of the group's polyphyletic origins).
		At first Staurikosaurus, Herrerasaurus, and Eoraptor (although meeting the requirements as dinosaurs) could not be placed in either Saurischia or Ornithischia.
	www.wvup.edu /ecrisp/lecoriginofdinosauria.html (1454 words)

	[No title]
		Berman, D.S. and McIntosh, J.S. Skull and relationships of the Upper Jurassic sauropod Apatosaurus (Reptilia, Saurischia).
		Madsen, J.H., Jr., McIntosh, J.S., and Berman, D.S. Skull and atlas-axis complex of the Upper Jurassic sauropod Camarasaurus Cope (Reptilia: Saurischia).
		McIntosh, J.S. and Berman, D.S. Description of the palate and lower jaw of the sauropod dinosaur Diplodocus (Reptilia: Saurischia) with remarks on the nature of the skull of Apatosaurus.
	www.nhm.ac.uk /hosted_sites/pe/2005_1/gomani27/refer.htm (1557 words)

	Saurischia (from dinosaur) -- Encyclopædia Britannica
		More results on "Saurischia (from dinosaur)" when you join.
		The Reptilia class of vertebrates became the first to live their entire life span on dry land (see Reptiles).
		While a bird may not fit the common notion of a dinosaur (the word dinosaur means “terrifying lizard”;), many scientists are certain that all birds are directly...
	www.britannica.com /eb/article-225951 (750 words)

	Cloning Dinosaurs
		There are two general groups of dinosaurs based on hip morphology The Saurischia (reptile-hipped) and the Ornithischia (bird-hipped).
		In the Saurischia, the pubis extends ventrally and anteriorly and only articulates with the ischium (and ilium) to form the hip "socket".
		Within the Saurischia there are two major groups the Therapods (beast-foot) and the Sauropods.
	biomed.brown.edu /Courses/BIO48/34.Cloning.Dinosaurs.HTML (802 words)

	dinosauromorpha (Site not responding. Last check: 2007-11-05)
		While it is usually my policy to separate dubious species from the genus to which they were originally assigned, in this case there doesn't seem to be much of a point.
		Saurischia and Ornithischia: Besides some basal forms, dinosaurs are traditionally divided into two groups based on hip anatomy: the saurischians, which had pelves with the pubis jutting away from the ischium; and the ornithischians, which had pelves with the pubis paralleling the ischium (like in birds).
		Early press releases called this a prosauropod and the earliest dinosaur, neither of which it turned out to be.
	personal2.stthomas.edu /jstweet/dinosauromorpha.htm (2916 words)

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