Dichotomous Key/Petromyzonidae
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< Dichotomous Key(Redirected from Dichotomous Key:Petromyzonidae)
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| Chordata keys |
| Subphyla |
| Myxini | Urochordata |
| Classes |
| Actinistia | Actinopterygii | Amphibia | Aves | Chondrichthyes | Dipnoi | Mammalia | Petromyzontida | Reptilia |
This is a Dichotomous Key for the Family Petromyzonidae.
[edit] 1
- Dorsal and caudal fin distinction
- The dorsal and caudal fins are distinct - Dichotomous Key:Petromyzon
- The dorsal and caudal fins are not distinct - #2
[edit] 2
- Depth of dorsal fin notch
- Shallow - Dichotomous Key:Ichthyomyzon
- Deep - Dichotomous Key:Lampetra
