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