Chordates Class M2

Front 1

Back 1

Osteolepiforms

Front 2

Back 2

Elpistostegalids

Front 3

Back 3

Crassigyrinus

Front 4

Back 4

Sirenidae - salamander lacking 4 limbs, only has two

Front 5

Back 5

Cryptobranchidae - known as hidden gills and part of the giant salamanders

Front 6

Back 6

Proteidae - includes mudpuppies and european olm

Front 7

Back 7

Congo eel - aquatic and only adults have developed lungs

Front 8

Back 8

Mole salamander

Front 9

Back 9

Plethodontidae - the lungless salamander using cutaneous respiration, some can drop tail

Front 10

Back 10

Toad (spadefoot)

Front 11

Back 11

Toad

Front 12

Back 12

African clawed frog (Xenopus)

Front 13

Back 13

Caecilian

Front 14

Back 14

Puerto Rican Coqui - posture of a water conserving tree frog

Front 15

Back 15

Australian snake necked turtle (bends neck horizontally to retract head)

Front 16

Back 16

South American Matamata (turtle) [that bends neck horizontally to retract]

Front 17

Back 17

Tortoise (bends neck in S shape)

Front 18

Back 18

Box & Pond Turtles (bend neck in S shape to retract)

Front 19

Back 19

Snapping Turtle

Front 20

Back 20

Soft Shelled Turtle (has webbed feet)

Front 21

Back 21

Loggerhead and Green Turtles (sea turtles)

Front 22

Back 22

Leatherback turtle (largest existant turtle, sea turtle and can dive up to 1000m)

Front 23

Back 23

Turtle Heart

Front 24

Back 24

Tuatara - had spines on back

Front 25

Back 25

Green and Black Iguanas

Front 26

Back 26

Chameleon (Chameleonidae - grasped tail and digits in pairs)

Front 27

Back 27

Legless lizard

Front 28

Back 28

Mososaur - Komodo Dragon is related to them

Front 29

Back 29

Thread Snake (blind snakes)

Front 30

Back 30

Puff Adder (Viper that has a blunt head for burrowing)

Front 31

Back 31

King snake and Milk Snake (crawl slowly and rely on chemoreception)

Front 32

Back 32

Whip Snake and Racers (move quickly and are visual predators)

Front 33

Back 33

Parrot Snake (have large eyes)

Front 34

Back 34

Ancestral Diapsid Condition (Tuatara) has 2 complete temporal arches

Front 35

Back 35

Reduction and eventual loss of lower temporal arch

Front 36

Back 36

Lizards with loss of lower temporal arch

Front 37

Back 37

Snakes (and some lizards) have a further loss of their upper temporal arch

Front 38

Back 38

Amphisbaenian Skull

Front 39

Back 39

Snakes usually swallow prey head first

Front 40

Back 40

Opisthoglyphous - fangs near rear of maxille and solid or groove on surface of fang

Front 41

Back 41

Protoglyphous - hollow fangs at front of maxille, permanently erect and short

Front 42

Back 42

Solenoglyphous - have long hollow teeth that can strike forward quickly

Front 43

Back 43

Aglyphous - Snakes without fangs

Front 44

Back 44

Lateral Undulation

Front 45

Back 45

Rectilinear locomotion (straight line)

Front 46

Back 46

Concertina

Front 47

Back 47

Sidewinding

Front 48

Back 48

Chuckwalla - lives in rocky foothills of Mojave Desert

Front 49

Back 49

Thorny Devil (collects dew on body)