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Phyllum Molluska
1
- Presence of a foot or derived organ Yes - 2
- No - Aplacophora (subclass Chaetodermomorpha)
2
- Torsion Present - Gastropoda
- Not present - 3
3
- Presence of chromatophores - Can the animal change color? Yes - Cephalopoda
- No - 4
4
- Shell divided into plates Yes - Polyplacophora
- No - 5
5
- Segmentation Yes, primitive - Monoplacophora
- No - 6
6
- Presence of captacula Yes - Scaphopoda
- No - 7
7
- Shell Two parts - Bivalvia
- One part - Aplacophora