All About Dinosaurs: •What is a Dinosaur? •93 Dinosaur Information Pages, including Apatosaurus, T. rex, Triceratops, Velociraptor, and more! •107 Dinosaur Print-outs •How Dinosaurs are Named •What Do Dinosaur Names Mean? •The Evolution of Dinosaurs •Dinosaurs and Birds •Record Breakers •Dinosaur Myths Dino News: •News Index Anatomy and Behavior: •Blood Pressure •Brains •Defense •Diet •General Anatomy •Herds and Packs •Hot or Cold Blooded? •Is it Male or Female? •Life Span •Locomotion •Offense •Reproduction, Nests, and Eggs •Size •Skeleton •Skin •Tail •Teeth The Mesozoic Era: Explore the climate, geology, and dinosaurs from these ancient times. •The Mesozoic Era ••Triassic period ••Jurassic period ••Cretaceous period •Ages of the Mesozoic Classification: •Dinosaur Classification ••Major Dinosaur Families ••Dinosaur Genera ••Saurischians - "Lizard-Hipped" Dinos ••Ornithischians - "Bird-Hipped" Dinos •What are Taxonomy and Cladistics? •Not Dinosaurs, but Old and Interesting •Dinosaur Cladogram (includes all of ornithodira) Dinosaur Fun! •Dinosaur Jokes •Online Coloring Book •Games, Puzzles, Quizzes, and Activities •Dinosaur Museums •Dinosaur Crafts •Art and Stamps •Movies •Vote for Your Favorite Dinosaur •Dino Fiction •Dinosaur Fan Pictures Illustrated Dinosaur Dictionary - over 1,504 entries: hundreds of dinosaurs and other ancient life forms, paleontology and geology terms, and the great fossil hunters of all time! Extinction: Why did the dinosaurs go extinct? •What is Extinction? •The Alvarez Asteroid Theory •Other K-T Extinction Theories •Studying Extinctions Fossils: •First Dinosaur Fossil Discoveries •What are Fossils? •How Fossils Form •Types of Fossils •Finding Fossils •Excavating Fossils •Dating Fossils •Bony Jigsaw Puzzles •Great Fossil Hunters •Fossil Locations ••Africa ••Antarctica ••Asia ••Australia ••Europe ••North America ••Canada ••Mexico ••Official US State dinos ••South America Dinosaur Quizzes: •Interactive, Illustrated Dinosaur Quiz! See if you know 10 basic dinosaur facts. The answers, both right and wrong, are explained thoroughly. • •Dinosaur Word Unscrambles Unscramble words to answer dino questions. Questions and Answers: •Top Dinosaur Questions! •Questions and Answers Plants From the Time of the Dinosaurs: Mesozoic Plants •Triassic Plants •Jurassic Plants •Cretaceous Plants Classroom Activities and Links: •Dinosaur Print-outs •Dinosaur Calendar to Print •Dinosaur Alphabet Book •Dinosaur Crafts •Dino Crossword puzzle •PreK-Grade 2 Activities and Print-outs •Grade 3+ Activities and Print-outs How to Write a Great Dinosaur Report •How to Write a Funny Dinosaur Poem •References and Recommended Books •Recommended Links Geologic Time Charts: •Detailed version Just the Mesozoic Era Site Index
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FAMILY SOME GENERA TIME RANGE SIZE
RANGE S A U R I S C H I A N S S A U
R I S C H I A N S S A U R I S C H I
A N S THEROPODS Bipedal predators
THEROPODS Bipedal predators
THEROPODS Bipedal predators
Herrerasauria Saltopodidae (leaping
feet) Saltopus, Eoraptor late
Triassic 2-3 feet (0.7-1 m) long
Staurikosaurids (Southern Cross
lizards) Staurikosaurus late
Triassic 6.5-10 feet (2-3 m) long
Herrerasaurids (Herrera lizards)
Herrerasaurus late Triassic to early
Jurassic 7-10 feet (2-3 m) long or
more Ceratosauria Coelophysids
(hollow form) Coelophysis, Saltopus
late Triassic to early Jurassic 2-10
feet (0.6-3 m) long Ceratosaurids
(horned lizards)
CeratosaurusSyntarsus Early-Late
Cretaceous 11.5-20 feet (3.5-6 m)
long Podokesaurids (swift-footed
lizards) Podokesaurus, Syntarsus
Early-Late Jurassic 3-10 feet (1-3
m) long Abelisaurids (Abel's lizard)
Abelisaurus, Indosaurus Early-Late
Cretaceous up to 36 feet (11 m) long
Noasaurids (lizards from NW
Argentina) Noasaurus Late Cretaceous
8 feet (2.4 m) long Segisauridae (Segi
Canyon Arizona lizards) Segisaurus,
Dilophosaurus late Triassic to Early
Jurassic 20 feet (6 m) long
Coelurosauria Coelurids (hollow
tails) Coelurus, Ornitholestes Late
Jurassic to Late Cretaceous 4-8 feet
(1.2-2.4 m) long Dryptosaurids
(wounding lizards) Dryptosaurus Late
Cretaceous +20 feet (6 m) long
Compsognathids (pretty jaw)
Compsognathus late Jurassic to early
Cretaceous 2-3 feet (0.6-0.9 m) long
Oviraptors (egg thieves) Oviraptor
Late Cretaceous 6 feet (1.8 m) long
Caenagnathids (recent jawless)
Caenagnathus, Microvenator Late
Jurassic to Late Cretaceous 7 feet
(2 m) long Avimimids (bird mimics)
Avimimus Late Cretaceous 5 feet (1.5
m) long Ornithomimids (bird mimics)
Ornithomimus Late Jurassic to Late
Cretaceous 11.5-19.5 feet (3.5-6 m)
long Garudimimids (Garuda mimics)
Garudimimus, Harpymimus Mid-Late
Cretaceous 11.6 feet (3.5 m) long
Deinocherids (terrible hands)
Deinocheirus Late Cretaceous 45 feet
(13.5 m) long (unsure - from
incomplete fossils) Dromaeosaurids
(running lizards) Caudipteryx,
Deinonychus, Dromaeosaurus,
Protarchaeopteryx, Sinornithosaurus,
Sinosauropteryx, Unenlagia,
Utahraptor, Velociraptor
Mid-Jurassic to Late Cretaceous 6-13
feet (1.8-4 m) long Troödontids
(wounding teeth) Troödon Late
Cretaceous 6.6 feet (2 m) long
Tyrannosaurids (tyrant lizards)
Tyrannosaurus, Albertosaurus,
Nanotyrannus Late Cretaceous 16-40
feet (5-12 m) long Carnosauria
Allosaurids (different lizards)
Allosaurus, Yangchuanosaurus Late
Jurassic 33-42 feet (10-12.8 m) long
Carcharodontosaurids (horned
lizards) Carcharodontosaurus,
Giganotosaurus Mid - Late Cretaceous
40+ feet (12 m) long Spinosaurids
(thorn lizards) Spinosaurus,
Suchomimus Late Jurassic to Late
Cretaceous 50 feet (15 m) long
Baryonychids (heavy claws) Baryonyx
Early Cretaceous 30 feet (9 m) long
Megalosaurids (giant lizards)
Megalosaurus, Altispinax, Erectopus
Late Jurassic to Late Cretaceous
23-30 feet (7-9 m) long Segnosauria
Therizinosaurids (scythe lizards)
Therizinosaurus Late Cretaceous 35
feet (10.7 m) long Segnosaurids
(slow lizards) Segnosaurus Late
Cretaceous 16-30 feet (5-9 m) long
SAUROPODS Quadrupedal herbivores
Prosauropoda Anchisaurids (near
lizards) Anchisaurus Mid-Triassic-
Early Jurassic 7-10 feet (2-3 m)
long Plateosaurids (flat lizards)
Plateosaurus, Mussaurus late
Triassic - Early Jurassic 5-26 feet
(1.5-8 m) long Melanorosaurids
(black mountain lizard)
Melanorosaurus, Riojasaurus late
Triassic- Early Jurassic 19-40 feet
(6-12 m) long Massospondylidae
(black mountain lizard)
Massospondylus late Triassic to
Early Jurassic 13 feet (4 m) long
Sauropoda Cetiosaurids (whale
lizards) Cetiosaurus, Protognathus
Late Jurassic to Late Cretaceous .
Camarasaurids (chambered lizards)
Camarasaurus Late Jurassic to Late
Cretaceous 40-60 feet (12-18 m) long
Dicraeosaurids (two-forked lizards)
Amargasaurus, Dicraeosaurus,
Rebbachisaurus Late Jurassic-Early
Cretaceous 33-28 feet (10-20 m) long
Euhelopodids (good marsh feet)
Euhelopus, Tienshanosaurus Late
Jurassic 33-90 feet (10-27 m) long
Titanosaurids (titanic lizards)
Aegyptosaurus, Alamosaurus,
Andesaurus, Argentinosaurus,
Hypselosaurus, Quaesitosaurus,
Saltasaurus, Titanosaurus Late
Jurassic to Late Cretaceous 30-70
feet (9-21 m) long Diplodocids
(double-beamed form) Diplodocus,
Apatosaurus, Barosaurus, Supersaurus,
Seismosaurus Late Jurassic to Late
Cretaceous 54-90 feet (16.5-27 m)
long Brachiosaurids (arm lizards)
Astrodon, Brachiosaurus, Ultrasauros
Mid-Late Jurassic- Early Cretaceous
33-82 feet (10-25 m) long O R N I T
H I S C H I A N S O R N I T H I S C
H I A N S ORNITH- OPODS herbivores
Fabrosauria, Lesotho- sauria
Fabrosaurids (Fabre's lizards)
Fabrosaurus, Lesothosaurus,
Xiaosaurus late Triassic to Early
Jurassic 3.3 feet (1 m) long
Heterodontosaurids (different-teeth
lizards) Heterodontosaurus late
Triassic to Early Jurassic 4 feet
(1.2 m) long Ornithopoda
Hypsilophodontids (high-ridged
teeth) Hypsilophodon, Orodromeus
Mid-Jurassic to Late Cretaceous 3-8
feet (0.9-2.4 m) long Dryosaurids
(oak lizards) Dryosaurus
Mid-Jurassic to Early Cretaceous
9-21 feet (2.7-6.5 m) long
Iguanodontids (iguana teeth)
Iguanodon, Ouranosaurus,
Anoplosaurus Early- Late Cretaceous
13.5-29 feet (4-9 m) long
Camptosaurids (bent lizards)
Camptosaurus, Muttaburrasaurus
Mid-Jurassic to Late Cretaceous 4-23
feet (1.2-7 m) long Hadrosaurids
(big lizards) Hadrosaurus, Maiasaura,
Anatotitan, Edmontosaurus,
Saurolophus, Trachodon Late
Cretaceous 12-50 feet (3.7-15 m)
long Lambeosaurids (Lambe's lizard)
Lambeosaurus, Bactrosaurus,
Corythosaurus, Jaxartosaurus,
Parasaurolophus Late Cretaceous
13-50 feet (4-15 m) long
Thescelosaurids (wonderful lizards)
Thescelosaurus Late Cretaceous 11
feet (3.4 m) long MARGINO- CEPHALIA
herbivores Pachycephalo- sauria
Pachycephalosaurids (thick-headed
lizards) Pachycephalosaurus,
Stegoceras, Stygimoloch Early - Late
Cretaceous 3-15 feet (0.9-4.6 m)
long Homalocephalids (even-headed
forms) Wannanosaurus Late Cretaceous
1.5-10 feet (0.5-3 m) long
Ceratopsia Protoceratopsids (first
horned faces) Protoceratops,
Bagaceratops, Leptoceratops,
Montanoceratops, Notoceratops,
Zuniceratops Late Cretaceous 3.3-10
feet (1-3 m) long Ceratopsidae
(horned faces) Anchiceratops,
Avaceratops, Arrhinoceratops,
Brachyceratops, Ceratops,
Monoclonius, Styracosaurus,
Torosaurus, Triceratops Late
Cretaceous 6-30 feet (1.8-9 m) long
Psittacosaurids (parrot lizards)
Psittacosaurus Early Cretaceous 6.5
feet (2 m) long THYREO- PHORA (ENOPLA-
SAURIA) armored, herbivorous,
quadrupeds x Scutellosaurids
(small-shield lizard) Scutellosaurus
Early Jurassic to Late Jurassic 2.4
feet (0.6-1.2 m) long Scelidosaurids
(limb lizards) Scelidosaurus Early
Jurassic 13 feet (4 m) long
Stegosauria Huayangosaurids (Huayang
lizards) Huayangosaurus, Tatisaurus
Mid-Jurassic 13 feet (4 m) long
Stegosaurinae (roof lizards)
Stegosaurus, Dacentrurus,
Kentrosaurus, Tuojiangosaurus,
Yingshanosaurus Late Cretaceous
13-30 feet (3-9 m) long
Stegosauridae (roof lizards)
Craterosaurus, Regnosaurus Early
Cretaceous 13 feet (4 m) long
Ankylosauria Nodosaurids (node
lizards) Nodosaurus, Acanthopholis,
Brachyspondosaurus, Edmontonia,
Hoplitosaurus, Minmi, Hylaeosaurus,
Polacanthus, Sauropelta,
Struthiosaurus Mid-Jurassic - Late
Cretaceous 6-25 feet (1.8-7.6 m)
long Ankylosaurids (fused lizards)
Ankylosaurus, Euoplocephalus,
Tarchia, Talarurus Early - Late
Cretaceous 18-35 feet (5.5-10.7 m)
long