CLASSIFICATION OF PONTOBDELLA

PHYLUM :- ANNELIDA (Metamerically segmented, coelomate and laterally symmetrical. )

CLASS :- HIRUDINEA (Annelids with fixed segments, without parapodia and with anterior and posterior
suckers.)

ORDER :- RHYCHOBDELLIDA OR AGNATHOBDELLIA (Proboscis protrusible; jaws and setae absent.)

FAMILY :- PISCICOLIDAE (jawless leeches, that are parasitic on fish)

GENUS :- Pontobdella (The skate sucker)

GEOGRAPHICAL DISTRIBUTION

  • It is found in Europe and U.S.A.

HABIT AND HABITAT

  • Pontobdella leads ectoparasitic life. It is a marine annelid, parasitizing skates and rays.

PONTOBDELLA

GENERAL CHARACTERSTICS OF PONTOBDELLA​

  • Body is cylindrical, club-shaped measuring approximately 20 cm in length.
  • Anterior region is narrow. 
  • Anterior sucker is saucer-shaped, fIrmly applied on the tissues of the host. 
  • Posterior sucker is deep and cub-shaped with serrated margin. 
  • Body surface is tuberculated having green tubercles or warts. It is rough and leathery.
  • Metameres are not very conspicuous. 
  • Eyes and gills are absent. 
  • Pharynx is protrusible without jaws. 
  • Hermaphroditic. Reproduction sexual. 
  • Eggs are velvety, laid in empty mollusc shells.
PONTOBDELLA

SPECIAL FEATURES

  • The skate sucker (P. muricata) guards over the eggs for about three months till they are hatched.

IDENTIFICATION

  • The animal contain green tubercles and all above features, hence it is Pontobdella.

PONTOBDELLA
PONTOBDELLA
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