CLASSIFICATION OF TJALFIELLA
It is abundantly found on the coasts of Japan.
HABIT AND HABITAT
Coeloplana is a marine solitary ctenophore.
GENERAL CHARACTERSTICS OF TJALFIELLA
- 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.
The animal has 12 to 60 erectile papillae and all above characters it is Coeloplana.