Oligochaeta

Question 1

Major specie

Characteristics Of Oligochaeta
In terms of body description
In terms of colour & surface
In terms of body segmentation
In terms of mouth & anus position

Answer 1

Lumbricus Terrestris[Earthworm]

They are long, somewhat roundish & pointed at both ends
Earthworm has a darkish purple dorsal surface & a light ventral surface
The body is divided into segments [Each segment has 4 pairs of short setae born at lateral and ventrolateral position]
The mouth is located at the ventral position in the first segment while at the anus is terminal at the last segment.