Dichotomous Key/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