Earthworm Classification and Body wall Class 11

Detailed anatomy by Prof. K.N. Bahl (1926). Earthworms has cosmopolitan distribution, with around 1800 species placed under several genera. About 40 species of earthworms are found in India. Largest genus is Pheretima that includes 500 species, widespread in tropical and temperate regions of the world. Thirteen of these species found in India. Pheretima posthuma is the most common species.
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Earthworm Classification and Body wall Class 11