CLASSIFICATION OF TOMOPTERIS
PHYLUM :- ANNELIDA (Metamerically segmented, coelomate and laterally symmetrical. )
CLASS :- POLYCHAETA (Many setae, clitellum absent. )
ORDER :- ERRANTIA (Free-swimming or burrowing, pharynx protrusible, provided with jaws and teeth. )
GENUS :- Tomopteris
- Found in U.S.A. and European countries.
HABIT AND HABITAT
Tomopteris is a marine pelagic polychaete.
GENERAL CHARACTERSTICS OF TOMOPTERIS
- Body of the animal is transparent consisting of 18-20 segments.
- Anterior end or head is distinct due to the presence of hammer-shaped prostomium which contains a pair of eyes and two pairs of chaetigerous processes or tentacular cirri. The posterior ones are very much elongated while anterior ones are short.
- Ventral mouth is without proboscis or jaws. Blood vascular system is also absent.
- Rest of the body segments possess a pair of parapodia. The parapodia are large biramous with membranous pinnules and are without setae.
- Each parapodium contains a brightly coloured, yellowish, spherical or rosette-shaped bioluminescent (photogenic) organ. The parapodia of the posterior side are reduced.
- Mouth leads into buccal cavity which leads into gut. Gut opens to outside by anus.
- The animal contains hammer shaped prostomium and two large chaetigerous cirri and all above characters, hence it is Tomopteris.