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Classes of Vertebrates

Name each class of Phylum Chordata based on the description
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LordGuacaba
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Last updated: April 8, 2017
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First submittedApril 8, 2017
Times taken45
Average score62.5%
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Description
Class
Slime producing marine fish, have a skull but no vertebral column
Myxini
Armored, jawless fishes, thought to be extinct
Cephalospidomorphi
Cartilaginous fishes, have jaws, paired fins, scales and no bone
Chondrichthyes
Bony fishes, cold blooded, use gills for breathing and fins for swimming
Osteichthyes
Live in water and on land, have 4 limbs that evolved from fins
Amphibia
Cold blooded, have 4 limbs, lay eggs
Reptilia
Technically a subgroup of reptiles, have feathers, toothless beaked jaws and lay eggs
Aves
Distinguished by possesion of hair, 3 middle ear bones and mammary glands
Mammalia
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1 Comments
Albrik
+1
Level 66
May 21, 2026
Cephalaspidomorphi is an extinct class, Petromyzontida is the correct answer.

Osteichthyes is a clade containing two classes: Actinopterygii and Sarcopterygii

(Myxini is also called Hyperotreti; Petromyzontida is also called Hyperoartia)

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