Dichotomous Key/Amphibia

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

1Edit

  • 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

Bold text

2: SalientiaEdit

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

3Edit

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

4: GymnophionaEdit

5: CaudataEdit

  • Narrow grooves between each nostril and the upper lip
    • Present - Plethodontidae
    • Not present - 14

6Edit

  • Inscriptional ribs

7Edit

  • Endochondral ossifications in the hyoid plate (distinct from parahyoid bones)
    • Present - Bombinatoridae
    • Not present - 8

8Edit

  • Narrow epipubic cartilage plate
    • Present - Discoglossidae
    • Not present - 9

9Edit

  • Astragalus and calcaneum
    • Fused - Pelodytidae
    • Not fused - 10

10Edit

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

11Edit

  • Tongue shape
    • Paddle-shaped - Megophryidae
    • Other or not existent - 12

12Edit

  • Tongue
    • Present - Neobatrachia
    • Not present - Pipidae

13Edit

14Edit

  • Fertilization
    • Internal - 15
    • External - #16

15: SalamandroideaEdit

  • Premaxillae
    • Fused - 18
    • Separated - 19

Dicamptodontidae, Salamandridae, Ambystomatidae, Proteidae, Rhyacotritonidae, Amphiumidae

16Edit

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

17: CryptobranchoideaEdit

  • Metamorphosis
    • Partial - Cryptobranchidae
    • Full - Hynobiidae

18Edit

  • Operculum
    • Present - 20
    • Not present - 21

19Edit

  • Operculum
    • Present - Salamandridae
    • Not present - Amphiumidae

20Edit

  • Lacrimal bone
    • Present - Dicamptodontidae
    • Not present - Ambystomatidae

21Edit

  • Bilaterally paired septomaxillary bones
    • Present - Rhyacotritonidae
    • Not present - Proteidae
Last modified on 3 May 2007, at 22:46