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Dichotomous Key/Mollusca
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Mollusca Animalia Animalia Mollusca Mollusca
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
cs:Dichotomický klíč:Mollusca