CLASSIFICATION OF TUBIFEX

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

CLASS :- OLIGOCHAETA (Few setae)

ORDER :- ARCHIOLIGOCHAETA (Small and fresh-water forms.)

GENUS :- Tubifex

GEOGRAPHICAL DISTRIBUTION

  • It is found in U.S.A. (Long Island Sound to Maine).

HABIT AND HABITAT

  • Tubifex is a tubicolous fresh-water archioligochaete, found abundantly on the bottom of deep lakes. The animal lives in tubes, made up of mud and minerals glued together by mucus.

TUBIFEX

GENERAL CHARACTERSTICS OF TUBIFEX​

  • Body is cylindrical, red coloured, metamerically segmented measuring 4 cm in length
  • First and second segments are prostomium and peristomium respectively.
  • Each segment contains 4 bundles of setae on dorsal and ventral sides.
  • Setae forked and hair-like in the dorsal bundles and only forked ones in ventral bundles. 
  • Clitellum is found in 11th and 12th segments. 
  • Contractile heart is found in 8th segment. Female-genital pores in the 11th segment and male-genital pore in the 12th segment.
  • Hermaphroditic. It reproduces sexually only.

SPECIAL FEATURES

  • Tubifex is encouraged to grow in filter beds of sewage disposal plants in order to keep the filter open. They have probably purifactory functions.

IDENTIFICATION

  • The animal contains 4-bundles of setae in each segment and all above features hence it is Tubifex.

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