CLASSIFICATION OF SYNAPTA
PHYLUM :- ECHINODERMATA (Coelomate, pentaradiate and spiny skinned animals with vascular system.)
SUB-PHYLUM :- ELEUTHEROZOA (Non-pedicellate and free-living.)
CLASS :- HOLOTHUROIDEA (Body orally and aborally elongated.)
ORDER :- SYNAPTIDA (Without tube feet.)
GENUS :- Synapta
It is found in Europe, Pacific coast and Bermuda.
HABIT AND HABITAT
Synapta inhabits under stones and occasionally in the sand near low water mark.
GENERAL CHARACTERSTICS OF SYNAPTA
- Synapta is a whitish elongated, worm-like, semitransparent and burrowing holothuroid. Size few to 60 cm.
- Mouth and anus are found at opposite ends.
- Mouth is enclosed by buccal membrane. Mouth opening is surrounded by 10 to 25 small bipinnate oral tentacles. Tentacles capture large and small zoophytes.
- Tube feet, respiratory tree, ossicles and cuverian tubules are absent.
- Longitudinal muscle bands are distinctly seen through transparent body.
- Some peculiar anchor plates are found in the thin body wall.
- When irritated, the animal show autotomy i.e., breaks into two or more pieces, which regenerate into new individuals.
Thyone is famous for its power of autotomy and regeneration. When irritated, the bodywall ruptures and organs are eviscerated (ejected out). The animal regenerates the missing part.
The animal contains has transparent body and all above features hence it is Synapta.