411 REFERENCE · Wikibooks
Dichotomous Key/Actinopterygii
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Selachimorpha Animalia Animalia Chordata Chordata Vertebrata Vertebrata Actinopterygii Actinopterygii
1
Spiracles
Present - Chondrostei
Either only remnants present or spiracles absent - #2
2
Spiracles
Remnants present - Holostei
Absent - Teleostei
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