Dichotomous Key/Octopoda

Dichotomous Key
Octopoda
Kingdom Animalia
Phylum Mollusca
Class Cephalopoda
Subclass Coleoidea
Superorder Octopodiformes
Order Octopoda

1

  • Cornea
    • Present - 2
    • Not present - 3

2: Incirrata

  • Detachable hectocotylus
    • Present - 5
    • Not present - 6

3: Cirrata

  • Secondary web
    • Present - 4
    • Not present - Opisthoteuthidae

4

  • Shell shape
    • Saddle-shaped - Cirroteuthidae
    • U-shaped - Stauroteuthidae

5: Argonautoida

  • Tissue consistency
    • Gelatinous - 10
    • Muscular - 9

6

  • Eye shape
    • Tubular - Amphitretidae
    • Other - 7

7

8

9

  • Web
    • Absent or greatly reduced except in four dorsal arms - Tremoctopodidae
    • Consistent - 11

10

11

  • Funnel locking-apparatus
Last modified on 6 September 2009, at 22:52