phylum chordata notochord nerve chord tail pharyngeal slits
TRANSCRIPT
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
Subphylum Cephalochordata
- Lanceletes
(AKA: Amphioxus)
notochord
Subphylum Cephalochordata-Poorly developed brain
- Poorly developed sense organs
-Considered an evolutionary link between invertebrates and vertebrates
notochord
Subphylum VertebrataSubphylum Vertebrata• Spinal chordSpinal chord• Movement accomplished w/ muscles attached to Movement accomplished w/ muscles attached to
an endoskeletonan endoskeleton• Digestive system w/ liver, digestive glands and Digestive system w/ liver, digestive glands and
pancreaspancreas• Heart w/ 2-4 chambersHeart w/ 2-4 chambers• Blood containing hemoglobinBlood containing hemoglobin• Paired kidneysPaired kidneys• General body plan consisting of a head, trunk General body plan consisting of a head, trunk
and two pairs of appendages (some are highly and two pairs of appendages (some are highly modified!)modified!)
Class AgnathaClass Agnatha
• Jawless fishJawless fish
• Cartilage skeletonCartilage skeleton
• Gill slitsGill slits
Gill SlitsGill Slits
Class AgnathaClass Agnatha
• Jawless fishJawless fish
• Cartilage skeletonCartilage skeleton
• Gill slitsGill slits
• No swim bladderNo swim bladder
• Two chambered heartTwo chambered heart
Two Chambered Heart
HagfishHagfish
HagfishHagfishmouthmouth
Lamprey
Lampreymouth
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
Platypus Egg
Babies
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
RodentsRodents
Rodents
RodentsRodents
Cats
DogsDogs
BatsBats
Marine MammalsMarine Mammals
Manatees
Farm animals
Elephants