Dichotomous Key/Reptilia
|
|
Chordata keys |
Subphyla |
---|
Myxini | Urochordata |
Classes |
Actinistia | Actinopterygii | Amphibia | Aves | Chondrichthyes | Dipnoi | Mammalia | Petromyzontida | Reptilia |
1 edit
2 edit
- Ribs adapted into hard shells
- Present - Testudines
- Not present - Tuatara
3 edit
- Cloacal opening
- Longitudinal slit Crocodylia
- Transverse slit - #4