Dichotomous Key/Amphibia
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1
[edit | edit source]| Chordata keys |
| Subphyla |
|---|
| Myxini | Urochordata |
| Classes |
| Actinistia | Actinopterygii | Amphibia | Aves | Chondrichthyes | Dipnoi | Mammalia | Petromyzontida | Reptilia |
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2: Salientia
[edit | edit source]3
[edit | edit source]4: Gymnophiona
[edit | edit source]5: Caudata
[edit | edit source]- Narrow grooves between each nostril and the upper lip
- Present - Plethodontidae
- Not present - 14
6
[edit | edit source]- Inscriptional ribs
- Present - Leiopelmatidae
- Not present - Ascaphus truei
7
[edit | edit source]- Endochondral ossifications in the hyoid plate (distinct from parahyoid bones)
- Present - Bombinatoridae
- Not present - 8
8
[edit | edit source]- Narrow epipubic cartilage plate
- Present - Discoglossidae
- Not present - 9
9
[edit | edit source]- Astragalus and calcaneum
- Fused - Pelodytidae
- Not fused - 10
10
[edit | edit source]11
[edit | edit source]- Tongue shape
- Paddle-shaped - Megophryidae
- Other or not existent - 12
12
[edit | edit source]- Tongue
- Present - Neobatrachia
- Not present - Pipidae
13
[edit | edit source]- Elongate atlantal neural arch
- Present - Rhinophrynus dorsalis
- Not present - Pelobatidae
14
[edit | edit source]15: Salamandroidea
[edit | edit source]Dicamptodontidae, Salamandridae, Ambystomatidae, Proteidae, Rhyacotritonidae, Amphiumidae
16
[edit | edit source]17: Cryptobranchoidea
[edit | edit source]- Metamorphosis
- Partial - Cryptobranchidae
- Full - Hynobiidae
18
[edit | edit source]19
[edit | edit source]- Operculum
- Present - Salamandridae
- Not present - Amphiumidae
20
[edit | edit source]- Lacrimal bone
- Present - Dicamptodontidae
- Not present - Ambystomatidae
21
[edit | edit source]- Bilaterally paired septomaxillary bones
- Present - Rhyacotritonidae
- Not present - Proteidae