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

GEOGRAPHICAL DISTRIBUTION

  • Found in U.S.A. and European countries.

HABIT AND HABITAT

  • Tomopteris is a marine pelagic polychaete.

TOMOPTERIS

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.
TOMOPTERIS

IDENTIFICATION

  • The animal contains hammer shaped prostomium and two large chaetigerous cirri and all above characters, hence it is Tomopteris.
TOMOPTERIS
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