U Dinosaur Hips

There were two main types of dinosaur. Giant sauropods like Diplodocus and ferocious theropods like Tyrannosaurus were "lizard-hipped" saurischians, with a large bone called the pubis pointing down between the hind legs. Other dinosaurs like Iguanodon were "bird-hipped" ornithischians, with a smaller pubis. Confusingly, modern birds actually evolved from saurischian dinosaurs.

U PTEROSAUR

The pterosaurs were not dinosaurs, but they had the same archosaur ancestors. They had a lot in common with the dinosaurs, but were not related to the group that eventually gave rise to the birds.

MYA 220

ARCHOSAURS

Ichthyosaurus Hips

The dolphinlike ichthyosaurs and other marine reptiles were part of a group called the euryapsids. These evolved separately from the archosaurs, but lived at the same time.

CERATOPSIANS

ORNITHOPODS

oRNITHIscHIA (BiRD-HippED)

The dolphinlike ichthyosaurs and other marine reptiles were part of a group called the euryapsids. These evolved separately from the archosaurs, but lived at the same time.

WHAT iS A DiNOSAUR?

ARCHOSAURS

rJ^^JLUr

ORNITHOPODS

THEROPODS

>

\

Dinosaur

Names

Dinosaur names are built

up from parts of mainly

Greek words, with some

Latin. The word "dinosaur"

itself comes from the Greek

deinos, meaning "terrible,"

and sauros meaning "lizard"

or "reptile."

So it means

"terrible reptile." More of

these words are listed below,

with their meanings.

Acro

top

Allo

strange

Alti

high

Brachio

arm

Brachy

short

Bronto

thunder

Cera

horned

Cheirus

hand

Coelo

hollow

Compso

pretty

Corytho

helmet

Derm

skin

Di

two

Diplo

double

Docus

beam

Echino

spiny

Elaphro

light

Hetero

different

Hypsi

high

Lepto

slender

Lopho

ridge, crest

Mega

huge

Micro

small

Odon(t)

tooth

Ophthalmo

eye

Pachy

thick

Physis

body

Plateo

flat

Pod, pus, pes

foot

Poly

many

Ptero

winged

Quadri

four

Raptor

thief

Rhino

nose

Salto

jumping

Saurus

lizard, reptile

Stego

roofed

Thero

beast

Tops

head, face

Tri

three

Tyranno

tyrant

Veloci

saurischia (lizard-hipped)

These meat-eating dinosaurs were among the most successful of the saurischian dinosaurs. Birds probably evolved from small theropods, and if so, then birds are the only living decendants of the dinosaurs

0 0

Post a comment