Ichthyology.

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Presentation transcript:

Ichthyology

“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

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

Cartilaginous Skeleton

Manta Ray

Sharks

Sting Ray

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

“bony fish”

Fish Diversity

Smallmouth Bass

Green Sunfish

Channel Catfish

Oklahoma Non-game Fish

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