Pheretima General Characteristics

After reading this article you will learn about Pheretima General Characteristics

Pheretima posthuma is a fossorial animal
Body has long, elongated, cylindrical in shape
Earthworm consists of 100-120 small ring-like segments
In all the segments of body except first, last and clitellum there is a setae
Setae help in locomotion by holding the earth
Prominent circular band of glandular tissue known as the clitellum which completely surrounds the segments from 14th to 16th
Earthworm is hermaphrodite
A pair of male genital apertures are situated in the 18th segment
Female genital aperture situated at the ventral side in the 14th segment
There are four pairs of small spermathecal apertures lying in the segments of 6,7,8,9
Genital papillae are the most prominent structures present in the ventral side of segment 17 and 19
Development is direct

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