Department of Zoology at ANDC/Zoology Museum/Museum specimens/Ctenophora

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Phylum Ctenophora

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= General Characteristics of Ctenophora =

Ctenophorans are marine animals.

= Classification of Ctenophora =

= A Few Examples =

1. Pleurobrachia
Commmon name-comb-jelly.

Habitat-found all over the world, marine and pelagic form.

IDENTIFYING CHARACTERS:-


 * Body-transparent, ovoidal, laterally compressed.


 * Body shape- pear shaped.


 * Length- about 2 cm.


 * Mouth- located at the oral pole.


 * Sense organ- located at aboral pole.


 * Locomotory organ- longitudinal comb plates.


 * Tentacle- two in number, very long, solid and highly extensile and retractile.

2. Cestum
Common name- Venus's girdle.

Habitat- marine and solitary, like to live in warmer seas.

IDENTIFYING CHARACTERS:-


 * Body- greatly elongated horizontally and compressed laterally.


 * Body shape- ribbon like.


 * Body color- green, blue and voilet.


 * Swimming plates- eigth in number, four are very small while other four are continued along the aboral edge.

3. Ctenoplana
Habitat- marine, solitary and planktonic.

IDENTIFYING CHARACTERS:-


 * Body-small and nearly circular, flattened dorso-ventrally.


 * Length- about 6 mm in diameter.


 * Body color- olive green

4. Ceoloplana
Habit and habitat- marine and solitary, found in the Red Sea and in Japan.

IDENTIFYING CHARACTERS:-


 * Body- oval, elongated in the tentacular plane.


 * Mouth- ventrally sotuated.


 * Swimming plate- absent.


 * Statocyst- present dorsally.


 * Tentacles- paired and retractile.


 * Fertilized eggs attach to the oral surface of mother.


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