Dichotomous Key/Selachimorpha
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This page may need to be | Selachimorpha | |
|---|---|
| Kingdom | Animalia |
| Phylum | Chordata |
| Subphylum | Vertebrata |
| Class | Chondrichthyes |
| Subclass | Elasmobranchii |
| Superorder | Selachimorpha |
1
2
- Dorsal fins
- One - Hexanchiformes
- Two - #5
3
- Body shape
- Flattened - Squatiniformes
- Fusiform - #4
4
- Snout length
- Long - Squaliformes
- Short - Pristiophoriformes
5
- Fin spines
- Present - Heterodontiformes
- Not present - #6
6
- Mouth position
- In front of eyes - Orectolobiformes
- Behind eyes - #7
7
- Nictitating membrane
- Present - Carcharhiniformes
- Not present - Lamniformes
