Fish Groups

Question 1

Myxinoidea

Answer 1

Hagfishes - the only craniates that are not vertebrates

They have a skull but no vertebral column (backbone)

Question 2

Petromyzontia

Answer 2

Lampreys - the only jawless vertebrates

Form the sister roux to all jawed vertebrates. There are about 40 species of living lampreys

Question 3

Chondrichthyes

Answer 3

Cartilaginous fishes - jawed fishes with internal skeletons made of cartilage, rather than bone.

Question 4

Elasmobranchs

Answer 4

The largest group of cartilaginous fishes, including sharks and rays

Question 5

Osteichthyes

Answer 5

Bony Fishes - Jawed fished with bony, calcified skeletons

Question 6

Sarcopterygii

Answer 6

Lobe-Finned Fishes and Tetrapods - Bony fishes with lobed fins.

these fishes were the ancestors of all limbed land vertebrates.

Question 7

Actinopterygii

Answer 7

Ray-finned Fishes - Bony fished with ray fins built from a fan of narrow bone or cartilage rods.

Question 8

Teleosts

Answer 8

Ray-finned fishes with mobile mouths, due to moveable upper jaws, and symmetrical (homocercal) tail fins.

Question 9

Euteleosts

Answer 9

Modern ray-finned fishes — the majority of teleosts.

Question 10

Acanthomorpha

Answer 10

Spiny-rayed fishes -Euteleosts with true bony spines in their dorsal, anal and pelvic fins

Question 11

Acanthopterygains

Answer 11

Spiny-rayed fishes with jaws that can be protruded when feeding.

This group includes about half of all fish species.

Question 12

Percomorphs

Answer 12

The largest most diverse group of fishes and the most advanced spiny-rayed fishes. Percomorphs share several structural features.

Question 13

Perciformes

Answer 13

Perchlike fishes - Percomorphs with spines and soft rays in their dorsal and anal fins.

Include 10k diverse species of marine and freshwater fishes