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

Phylum Ctenophora Date & Time : 22, December 2024 17:55 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.