Phylum Chordata
•
•
•
•
Notochord
Nerve chord
Tail
Pharyngeal slits
Evolution of the jaw
Phylum Chordata
• Notochord
• Nerve chord
• Tail
• Pharyngeal slits
Subphylum
Urochordata
Sea Squirts
Have notochord as a
larvae
Sessile as adult
Tunicate (Sea Squirt)
Slipper Tunicate
Stalked Tunicate
notochord
Subphylum
Cephalochordata
- Lanceletes
(AKA: Amphioxus)
notochord
Subphylum Cephalochordata
-Poorly developed brain
- Poorly developed sense
organs
-Considered an
evolutionary link
between invertebrates
and vertebrates
Subphylum Vertebrata
• Spinal chord
• Movement accomplished w/ muscles attached to
an endoskeleton
• Digestive system w/ liver, digestive glands and
pancreas
• Heart w/ 2-4 chambers
• Blood containing hemoglobin
• Paired kidneys
• General body plan consisting of a head, trunk
and two pairs of appendages (some are highly
modified!)
Class Agnatha
• Jawless fish
• Cartilage skeleton
• Gill slits
Gill Slits
Class Agnatha
•
•
•
•
•
Jawless fish
Cartilage skeleton
Gill slits
No swim bladder
Two chambered heart
Two Chambered Heart
Hagfish
Hagfish
mouth
Lamprey
Lamprey
mouth
Class Chondrichthyes
•
•
•
•
Cartilage skeleton
Gill slits
Dermal denticles (skin teeth)
No swim bladder
Prehistoric Sharks
Nurse Shark
Reef Shark
Hammerhead Shark
Southern Sting Ray
Spotted Eagle Ray
Class Osteichthyes
• Bony skeleton
• Swim bladder
• Operculum
Nassau Grouper
Beaugregory
Damselfish
Queen
Parrotfish
Spotfin
Butterflyfish
Gray Angelfish
Moray Eel
Seahorse
Class Amphibia
• Aquatic juvenile
• Terrestrial adult
Class Amphibia
•
•
•
•
•
Aquatic juvenile
Terrestrial adult
Thin, moist skin
Must live in wet habitat
Three Chambered Heart
Tree Frog
American Toad
Salamander
Salamander
Larvae
Redspot
Newt
Class Reptilia
• Thick, scaly skin
• Lay eggs on land
• 4 chambered heart, but ventricles not
completely divided
Reptiles
Corn Snake
Ribbon Snake
Red Tailed
Boa
Constrictor
Green Iguana
Leopard
Geckos
American Alligator
Baby Alligator
Hawksbill Sea Turtle
Green Sea Turtle
Red-Bellied Turtle
Class Aves
• Endothermic
(warm blooded)
• Incubate eggs
• Feathers
• Hollow bones
• Beak
• 4 chambered heart
Birds - Aves
Osprey
Great Blue Heron
Green Backed
Heron
White Ibis
Roseate Spoonbills
Brown Pelican
Class Mammalia
• Endothermic
(warm blooded)
• Fur
• Nurse young
• 4 Chambered
Heart
Mammals
Subclass
Monotremata
• Lay eggs
• Nurse young
Duck Billed
Platypus
Babies
Platypus Egg
Spiny Anteater
Subclass
Metatheria
• Marsupial
• Pouch
Kangaroo
Baby weighs about
1 gram (0.4 oz)
Koala
Baby Koala
Oppossum
Sugar
Gliders
Subclass
Eutheria
Placental
Mammals
Rodents
Rodents
Rodents
Cats
Dogs
Bats
Marine Mammals
Manatees
Farm
animals
Elephants