Species richness was found higher in Villianur locality, where the number of habitats was also high. Among the different species, based on age group and population densities (number m-2), earthworm density was maximum in vermiculture area (358) and lowest in saline (25) habitats. Diversity index and species richness is presented. mauritii was dominant in all the habitats of the region. Earthworm species diversity in fourteen localities from different habitats is presented. barnesi belonging to seven genera and six families were noted. scandens, Pontodrilus bermudensis, Pontoscolex corethrurs, Lampito mauritii, Perionyx excavatus, Eudrilus eugeniae, Octochaetona serrata and O. Ten species of earthworms Drawida willsi, D. Distribution pattern of earthworm fauna in Pondicherry region and its population densities were studied.
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