Dichotomous Key/Hexapoda

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Dichotomous Key
Hexapoda
Kingdom Animalia
Phylum Arthropoda
Subphylum Hexapoda

1

  • Wings
    • Present - 12
    • Not present - 2

2

  • Lifestyle
    • Parasitic - 3
    • Not parasitic - 4

3

4

  • Cerci
    • Present - 5
    • Not present - 6

5

  • Orientation of cerci

6

  • Mouthparts
    • Mouthparts external and easily visible - 9
    • Mouthparts not easily visible - 7

7

  • Presence of eyes

8

9

  • Mouthparts
    • Adapted for sucking - Hemiptera
    • Adapted for chewing - 10

10

  • Pincer-like cerci on abdomen

11

  • Forelegs
    • Forelegs raptatorial - Mantodea
    • Forelegs not raptatorial - 13

12

  • Number of wings
    • One pair - 17
    • Two pairs - 18

13

14

15

16

17

18

  • Forewings
    • Membranous - 19
    • Not membranous - 31

19

  • Wing texture and color
    • Covered in scales or hairs - 37
    • Transparent - 20

20

  • Tail-like appendages
    • Present - 21
    • Not present - 23

21

  • Comparative wing size

22

  • Comparative cerci size
    • Both abdominal cerci approximately equal in size - Plecoptera
    • Abdominal cerci unequal in size - Embioptera

23

  • Wing venation
    • Extensive - 28
    • Minor - 24

24

25

  • Wing texture

26

27

28

  • Position of wings at rest
    • Held away from body - Odonata
    • Held against body - 29

29

30

31

32

  • Forewings hardened
    • Forewings hard - 33
    • Forewings not hardened (may be leathery) - 34

33

34

  • Hind legs

35

  • Forelegs

36

37