Dichotomous Key/Amphibia

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Dichotomous Key: Amphibia
Kingdom: Animalia
Phylum: Animalia
Subphylum: Chordata
Class: Amphibia
Information related to Amphibia
Wikipedia
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Parent key: Chordata
Subphyla
Vertebrata
Key: Amphibia
Vertebrata
Amphibia

1[edit]

  • Number of vertebrae
    • Nine or fewer - 2
    • More than nine - 3
Chordata keys
Subphyla
Myxini | Urochordata
Classes
Actinistia | Actinopterygii | Amphibia | Aves | Chondrichthyes | Dipnoi | Mammalia | Petromyzontida | Reptilia

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2: Salientia[edit]

  • Tailwagging muscles
    • Present - 6
    • Not present - 7

3[edit]

  • Tail
    • Present in all life stages - 5
    • Not present in all life stages - 4

4: Gymnophiona[edit]

5: Caudata[edit]

  • Narrow grooves between each nostril and the upper lip

6[edit]

7[edit]

  • Endochondral ossifications in the hyoid plate (distinct from parahyoid bones)

8[edit]

9[edit]

10[edit]

  • Metatarsal spade
    • Present - 13
    • Not present - 11

11[edit]

  • Tongue shape

12[edit]

13[edit]

14[edit]

  • Fertilization
    • Internal - 15
    • External - #16

15: Salamandroidea[edit]

  • Premaxillae
    • Fused - 18
    • Separated - 19

Dicamptodontidae, Salamandridae, Ambystomatidae, Proteidae, Rhyacotritonidae, Amphiumidae

16[edit]

  • Metamorphosis
    • Present (fully or partially) - 17
    • Not present - Sirenidae

17: Cryptobranchoidea[edit]

18[edit]

  • Operculum
    • Present - 20
    • Not present - 21

19[edit]

20[edit]

21[edit]