CLASSIFICATION OF BRANCHELLION

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 :- Branchellion

GEOGRAPHICAL DISTRIBUTION

  • It is not reported from India.

HABIT AND HABITAT

  • Branchellion is a marine leech, found as parasite on torpedo.

BRANCHELLION

GENERAL CHARACTERSTICS OF BRANCHELLION​

  • Body is small elongated, cylindrical and measuring approximately 10 cm in length. 
  • Animal measures about 10 cm long. 
  • Body is differentiated into a narrow anterior region, the neck or thorax, and a wide posterior region, the trunk or abdomen.
  • Abdomen contains 11 pairs of lateral, foliaceous outgrowths of the body which form gills
  • Gills are in the form of paired appendages. 
  • Anterior end is everted to form the proboscis.
  • Suckers are prominent and pedunculate.
BRANCHELLION

IDENTIFICATION

  • The animal contains 11 pairs of gills, hence it is Branchellion.

BRANCHELLION
BRANCHELLION
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