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fandomhigh2006-01-25 02:15 pm
dr-tommy.livejournal.com) wrote in fandomhigh2006-01-25 02:15 pm
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Paleontology, Jan 25th (7th period)
At the front of the classroom is a diagram
"Today, we're going to start talking about dinosaurs." Tommy grins.
"With the discovery of many new species since the 1840s, the Dinosauria- that's the name of the Superorder- if you want to know the taxonomic classfication from Kingdom on down, it's: Kingdom: Animalia, Phylum: Chordata, Class: Sauropsida, Superorder: Dinosauria- anyway, it contains two major Orders of dinosaurs: the Ornithischia, or "bird-hipped" dinosaurs, and the Saurischia, or "lizard-hipped" dinosaurs. The division between the two groups was made by H.G. Seeley in 1888. The etymology behind the two names ("bird-hipped" vs. "lizard-hipped") is not very accurate, since some saurischians had bird-like hips, and ornithischians' hips were somewhat birdlike due to convergent evolution, not due to direct ancestry. Modern day birds are actually classfied under saurischia."
"Saurischia contains two suborders," Tommy says as he points to the diagram.
"Sauropodomorpha is the first group, and includes both the "prosauropods" — a group of largely herbivorous, dominantly quadrupedal dinosaurs such as Plateosaurus; and the Sauropoda: long-necked, long-tailed, enormous herbivorous dinosaurs like Apatosaurus (formerly called Brontosaurus), Brachiosaurus, and Diplodocus.
"Theropoda is the second saurischian group, consisting of the carnivorous dinosaurs. The Theropoda includes some extinct dinosaurs such as Tyrannosaurus rex and Dilophosaurus, but it also includes the living descendants of the dinosaurs — the birds.
"Ornithischia contains three suborders:
"Thyreophora includes the various armored dinosaurs, like Stegosaurus and Ankylosaurus.
"Marginocephalia consists mainly of the Superfamilies pachycephalosaurs (bone-heads) and the ceratopsids (horned dinosaurs), like Triceratops.
"Ornithopoda is the third Ornithischian group, and includes not only small bipedal plant-eaters like Heterodontosaurus, but also the often large hadrosaurs, or "duck-billed dinosaurs".
"These suborders are further divided into families, as you can see on the diagram.
"Your homework for Monday is to pick a dinosaur 'family' and write a paragraph on the basic characteristics of that family- how many legs does it stand on, is it a carnivore or a herbivore, does it have horns, or plates? You get the idea."
(ooc: Just... pretend the suborders under Saurischia are labelled as such, yes?)
"Today, we're going to start talking about dinosaurs." Tommy grins.
"With the discovery of many new species since the 1840s, the Dinosauria- that's the name of the Superorder- if you want to know the taxonomic classfication from Kingdom on down, it's: Kingdom: Animalia, Phylum: Chordata, Class: Sauropsida, Superorder: Dinosauria- anyway, it contains two major Orders of dinosaurs: the Ornithischia, or "bird-hipped" dinosaurs, and the Saurischia, or "lizard-hipped" dinosaurs. The division between the two groups was made by H.G. Seeley in 1888. The etymology behind the two names ("bird-hipped" vs. "lizard-hipped") is not very accurate, since some saurischians had bird-like hips, and ornithischians' hips were somewhat birdlike due to convergent evolution, not due to direct ancestry. Modern day birds are actually classfied under saurischia."
"Saurischia contains two suborders," Tommy says as he points to the diagram.
"Sauropodomorpha is the first group, and includes both the "prosauropods" — a group of largely herbivorous, dominantly quadrupedal dinosaurs such as Plateosaurus; and the Sauropoda: long-necked, long-tailed, enormous herbivorous dinosaurs like Apatosaurus (formerly called Brontosaurus), Brachiosaurus, and Diplodocus.
"Theropoda is the second saurischian group, consisting of the carnivorous dinosaurs. The Theropoda includes some extinct dinosaurs such as Tyrannosaurus rex and Dilophosaurus, but it also includes the living descendants of the dinosaurs — the birds.
"Ornithischia contains three suborders:
"Thyreophora includes the various armored dinosaurs, like Stegosaurus and Ankylosaurus.
"Marginocephalia consists mainly of the Superfamilies pachycephalosaurs (bone-heads) and the ceratopsids (horned dinosaurs), like Triceratops.
"Ornithopoda is the third Ornithischian group, and includes not only small bipedal plant-eaters like Heterodontosaurus, but also the often large hadrosaurs, or "duck-billed dinosaurs".
"These suborders are further divided into families, as you can see on the diagram.
"Your homework for Monday is to pick a dinosaur 'family' and write a paragraph on the basic characteristics of that family- how many legs does it stand on, is it a carnivore or a herbivore, does it have horns, or plates? You get the idea."
(ooc: Just... pretend the suborders under Saurischia are labelled as such, yes?)
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MajorJunior, I skipped breakfast to go talk someone into running for Mayor.