7 Vertebrate Classes
 
Class
Main Characteristics
Examples
Agnatha

Jawless, cartilagenous skeleton, notocord present, lacks paires appendages, 2 chambered heart

Lamprey and Hagfish

Chondrichthyes

Cartilagenous skeleton, jaws,paired appendages, gills, no operculum, no swim bladder, internal fertilization, placoid scales, 2 chambered heart.

Sharks, skates, rays, chimearas

Osteichthyes

Bony skeleton, jaws, external fertilization, swim bladder, operculum, ctenoid scales, 2 chambered heart.

Bass, trout, perch, tuna

Amphibia

Appendages adapted for land use,tadpole stage, respiration through lung/skin, smooth moist skin, 3 chambered heart.

Salamanders, newts, frogs, toads

Reptilia

Scaly skin, respiration via lungs, lay amniotic egg Partially divided septum.

Snakes, lizards, turtles, crocodiles

Aves

Feathers, forelimbs modified as wings, respiration though lungs, endothermic, 4 chambered heart, amniotic egg.

Owls, sparrow, penguins, eagles

Mammalia

young nourished by mammary glands, diaphragm, 4 chambered heart, hair, endothermic, viviparous

Monotremes, marsupials, and Placentals.

Click here for more detailed information.