COELOPLANA

CLASSIFICATION OF COELOPLANA

PHYLUM :- CTENOPHORA (Biradially symmetrical. Radiata without nematocysts. )

CLASS :- TENTACULATA  (With tentacles.)

ORDER :- PLATYCTENEA (With 2 tentacles and without comb rows. )

GENUS :- Coeloplana

GEOGRAPHICAL DISTRIBUTION

It is abundantly found on the coasts of Japan.

HABIT AND HABITAT

Coeloplana is a marine solitary ctenophore.

COELOPLANA

GENERAL CHARACTERSTICS OF COELOPLANA

  • Flat oval elongated animal in tentacular plan and measuring approximately 60 mm in length.
  • It is transparent or coloured on the aboral surface in various shades like olive and reddish. 
  • It creeps on some alcyonarians as an ectocommensal. 
  • There is a tentacle in each notch. 
  • Tentacle arises from tentacle base. Tentacle is enclosed in a tentacular sheath. 
  • Statocyst is mid-dorsally placed. 
  • Anteriorly tentacle shows branching. Peripheral network of alimentary canal are clearly seen. 
  • Comb rows are absent. The diagnostic feature of the animal is the presence of 12 to 60 erectile papillae depending on species. 
  • Tentacular canals and meridional canals are present in the middle. Gonads present posteriorly 
  • Gonads (testes and ovary) are found in the wall of 8 meridional canals. The egg gives rise to typical ctenophore cydippid larva that develops into the adult.
  • It reproduces sexually.
COELOPLANA

IDENTIFICATION

The animal has 12 to 60 erectile papillae and all above characters it is Coeloplana.

COELOPLANA
COELOPLANA
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