Echinodermata Classes Flashcards

1
Q

What are the classes?

A

Asteroidea, Echinoidea, Holothuroidea, Ophiuroidea, Crinoidea

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2
Q

What does Asteroidea mean?

A

Star form

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3
Q

Asteroidea characteristics?

A

star shaped

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4
Q

What organisms are in Asteroidea?

A

sea stars, bat stars, sun stars

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5
Q

What does Echinoidea mean?

A

spiny form

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6
Q

Echinoidea characteristics?

A

more or less globular or disc shaped with no arms

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7
Q

What organisms are in Echinoidea?

A

Sea urchins, sand dollars

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8
Q

What does Holothuroidea mean?

A

cucumber form

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9
Q

Holothuroidea characteristics?

A

cucumber shaped with no arms
-spine absent
-circumoral tentacles

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10
Q

What organisms are in Holothuroidea?

A

sea cucumbers

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11
Q

What does Ophiuroidea mean?

A

snake tail

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12
Q

Ophiuroidea characteristics?

A

star shaped with arms sharply marked off from central disc

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13
Q

What organisms are in Ophiuroidea?

A

Brittle Stars & Basket Stars

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14
Q

What does Crinoidea mean?

A

Lily form

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15
Q

Crinoidea characteristics?

A

five arms branching at base

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16
Q

What organisms are in Crinoidea?

A

Sea Lillies and Feather Star