Pheretima General Characteristics
After reading this article you will learn about Pheretima General Characteristics
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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