Classification:

• Phylum - Annelida
• Class - Oligochaeta
• Order - Archioligochaeta
• Genius - Tubifex

Comments:

1. 1. Body is cylindrical, red coloured, metamerically segmented measuring 4 cm in length.
2. 2. First and second statements are prostomium and peristomium respectively.
3. 3. Each segment contains 4 bundles of setae on the dorsal and ventral sides.
4. 4. Setae forked and hair-like in the dorsal bundles and only forked ones in ventral bundles.
5. 5. Clitellum is found in the 11th and 12th segment.
6. 6. Contractile heart is found in the 8th segment. Female-genital pores in the 11th segment and male-genital pore in the 12th segment.
7. 7. Hermaphroditic. It reproduces sexually only.

Source:

1. Practical Zoology Invertebrates by S.S.Lal. 2. A Manual of Practical Zoology Chordates by Dr. P.S. Verma.