Abstract
A field study undertaken in 5 different species of bamboo plantations in West Tripura revealed presence of 18 species of earthworms belonging to 4 different families viz Megascolecidae [Metaphire houlleti (Perrier), Kanchuria sp1, Lampito mauritii Kinberg, Amynthus alexandri (Beddard), Perionyx excavatus Perrier, Metaphire posthuma (Vaillant)], Octochaetidae [Eutyphoeus gigas Stephenson, Eutyphoeus comillahnus Michaelsen, Eutyphoeus orientalis (Beddard), Dichogaster bolaui Michaelsen, Lennogaster chittagongensis (Stephenson), Lennogaster yeicus (Stephenson), Eutyphoeus turaensis Stephenson and Octochaetona beatrix (Beddard)], Moniligastridae [Drawida assamensis Gates, Drawida nepalensis Michaelsen and Drawida papillifer papillifer (Stephenson) and Glossoscolecidae (Pontoscolex corethrurus Muller). One species E. comillahnus is restricted only to Tripura of India. Bamboo plantations were mostly dominated by endogeic (geophagous) species. Among the plantations B. polymorpha had the highest density (175 ind./m2) and biomass (75 g/m2) of the earthworms, whereas the highest earthworm diversity (Ĥ 1.67) was found in B. cacharensis plantation.
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