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Fig. 34-3 PowerPoint PPT Presentation


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Dorsal, hollow nerve cord. Muscle segments. Fig. 34-3. Notochord. Mouth. Anus. Pharyngeal slits or clefts. Muscular, post-anal tail. Cirri. 2 cm. Mouth. Fig. 34-4. Pharyngeal slits. Atrium. Notochord. Digestive tract. Atriopore. Dorsal, hollow nerve cord. Segmental muscles.

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Fig. 34-3

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Dorsal,

hollow

nerve cord

Muscle

segments

Fig. 34-3

Notochord

Mouth

Anus

Pharyngeal

slits or clefts

Muscular,

post-anal tail


Cirri

2 cm

Mouth

Fig. 34-4

Pharyngeal slits

Atrium

Notochord

Digestive tract

Atriopore

Dorsal, hollow

nerve cord

Segmental

muscles

Anus

Tail


Incurrent

siphon

to mouth

Water flow

Notochord

Fig. 34-5

Dorsal, hollow

nerve cord

Excurrent

siphon

Tail

Excurrent

siphon

Excurrent

siphon

Atrium

Muscle

segments

Incurrent

siphon

Pharynx

with

slits

Intestine

Anus

Stomach

Intestine

Tunic

Atrium

Esophagus

Pharynx with slits

Stomach

An adult tunicate

A tunicate larva


Echinodermata

(sister group to chordates)

Cephalochordata

(lancelets)

ANCESTRAL

DEUTERO-

STOME

Chordates

Urochordata

(tunicates)

Notochord

Myxini

(hagfishes)

Common

ancestor of

chordates

Fig. 34-2

Craniates

Petromyzontida

(lampreys)

Head

Vertebrates

Chondrichthyes

(sharks, rays, chimaeras)

Vertebral column

Actinopterygii

(ray-finned fishes)

Gnathostomes

Jaws, mineralized skeleton

Actinistia

(coelacanths)

Osteichthyans

Lungs or lung derivatives

Lobe-fins

Dipnoi

(lungfishes)

Lobed fins

Amphibia (frogs,

salamanders)

Tetrapods

Reptilia

(turtles, snakes,

crocodiles, birds)

Legs

Amniotes

Amniotic egg

Mammalia

(mammals)

Milk


(a) Yellowfin tuna (Thunnus albacares)

Fig. 34-17

(b) Clownfish (Amphiprion ocellaris)

(d) Fine-spotted moray eel

(Gymnothorax dovii)

(c) Sea horse (Hippocampus      ramulosus)


(a) Order Urodela

Fig. 34-21

(b) Order Anura

(c) Order Apoda


(a) Tuatara (Sphenodon punctatus)

Fig. 34-27

(b) Australian thorny devil

lizard (Moloch horridus)

(c) Wagler’s pit viper

(Tropidolaemus wagleri)

(d)Eastern box turtle (Terrapenecarolinacarolina)

(e) American alligator

(Alligator mississippiensis)


(a) Emu

Fig. 34-30

(b) Mallards

(c) Laysan albatrosses

(d) Barn swallows


Fig. 34-35b


(a) Gibbon

(b) Orangutan

(c) Gorilla

Fig. 34-39

(d) Chimpanzees

(e) Bonobos


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