Class Characteristics

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Last updated 5:40 PM on 9/25/26
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8 Terms

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Myxini

Hagfish ; Jawless, Elongated Body

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Cephalaspidomorphi

Lamprey ; Jawless, Circular Sucking Mouth

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Chondrichthyes

Cartilage, Exposed Gill Openings, Paired Fins, Jaws, Teeth Not Fused to Jaws

Sharks, Rays, Skates, Chimeara

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Chondricthyes Subclasses

Holocephali (Sub Class)- Chimearas

Elasmobranchii(Sub Class) - Sharks ; Batoidea (Division) - Skates, Rays

Subclass Selachii - Sharks


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Sarcopterygii (Class) Characteristics

Lung Fishes Lobe Finned Fishes

Lobed Fins, Fleshy Fins, Scaled with Keratin and Bone, Fins Have Bone

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Sarcopterygii’s (Class) Orders

Ray Finned Fishes

Coelacanthiformes → Coelacanths → Lobe Finned Fish

Order Dipnoi (Ceratodiformes) → Lungfishes

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Actinopterygii’s (Class) Characteristics

Ray Finned Fish

Ray Fins, Mobile/Protrusible Mouthparts, Ganoid → Cycloid → Ctenoid Scales


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Actinopterygii’s (Class) Subclasses

4 Orders

  • Polypteriformes → Bichirs

  • Acipenseriformes → Sturgeons

  • Lepisosteiformes → Gars

  • Amiiformes → Bowfin

as well as Teleostei (Division) Containing 35-38 Order

These are the newer fish. They look unique like seahorses and puffer fish.