Dichotomous Key/Cephalopoda

Cephalopoda
Cephalopoda
KingdomAnimalia
PhylumMollusca
Class

Information related to Cephalopoda

Wikipedia • Wikispecies •

Wikicommons

1

  • External shell
    • Present - Nautiloidea
    • Not present - 2

2: Coleoidea

  • Modified (or lost) arm pair
    • Arm pair IV - 3
    • Arm pair II - 4
Mollusca keys
Classes
Aplacophora | Bivalvia | Caudofoveata | | Gastropoda | Monoplacophora | Polyplacophora | Scaphopoda

3: Decapodiformes

  • Cornea
    • Present - 6
    • Not present - 5

4: Octopodiformes

5

6: Sepioidea

  • Cuttlebone
    • Present - Sepiidae
    • Not present - 8

7

8: Sepiolida

  • Depressions on funnel locking-apparatus
    • One - Sepiolidae
    • Two, or apparatus fused - Sepiadariidae

9

  • Adhesive organ on dorsal surface of mantle
    • Present - Idiosepiidae
    • Not present - Myopsida

10

  • Branchial canals in gills
    • Present - 11
    • Not present - 9

11: Bathyteuthoida

  • Buccal connectives attaching to border of arms IV
    • Dorsal border of arms IV - Bathyteuthidae
    • Ventral border of arms IV - Chtenopterygidae
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