Echinodermata Classes

Question 1

What are the classes?

Answer 1

Asteroidea, Echinoidea, Holothuroidea, Ophiuroidea, Crinoidea

Question 2

What does Asteroidea mean?

Answer 2

Star form

Question 3

Asteroidea characteristics?

Answer 3

star shaped

Question 4

What organisms are in Asteroidea?

Answer 4

sea stars, bat stars, sun stars

Question 5

What does Echinoidea mean?

Answer 5

spiny form

Question 6

Echinoidea characteristics?

Answer 6

more or less globular or disc shaped with no arms

Question 7

What organisms are in Echinoidea?

Answer 7

Sea urchins, sand dollars

Question 8

What does Holothuroidea mean?

Answer 8

cucumber form

Question 9

Holothuroidea characteristics?

Answer 9

cucumber shaped with no arms
-spine absent
-circumoral tentacles

Question 10

What organisms are in Holothuroidea?

Answer 10

sea cucumbers

Question 11

What does Ophiuroidea mean?

Answer 11

snake tail

Question 12

Ophiuroidea characteristics?

Answer 12

star shaped with arms sharply marked off from central disc

Question 13

What organisms are in Ophiuroidea?

Answer 13

Brittle Stars & Basket Stars

Question 14

What does Crinoidea mean?

Answer 14

Lily form

Question 15

Crinoidea characteristics?

Answer 15

five arms branching at base

Question 16

What organisms are in Crinoidea?

Answer 16

Sea Lillies and Feather Star