1. Ichthyology

2. “jawed fishes” Class Chondrichthyes- cartilagenous
Subclass Elasmobranchii- sharks, rays, and skates
Subclass Holocephali- chimeras & ratfishes
Class Osteichthyes- bony fishes
Subclass Dipnoi- lung fishes
Subclass Crossopterygii- coelocanth
Subclass Actinopterygii- modern bony fishes

3. Class Chondrichthyes: (Cartilaginous Fishes)
general diagnostic characters:
reduced dermal armor
cartilaginous endoskeleton & girdles
tricuspid teeth
gill slits
fins: two dorsal, no anal, stiff pectorals, flexible pelvic
heterocercal tail

4. Cartilaginous Skeleton

5. Manta Ray

6. Sharks

7. Sting Ray

8. Class Osteichthyes: “bony fishes”
most abundant and diverse vertebrates >21,000 species
bony scales (enlarged in the head region)
operculum covering the gills
stream-lined; laterally compressed
ossified endoskeleton; secondarily lost in some species

9. “bony fish”

10. Fish Diversity

11. Smallmouth Bass

12. Green Sunfish

13. Channel Catfish

14. Oklahoma Non-game Fish