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Dichotomous Key/Chondrichthyes
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Chondrichthyes Animalia Animalia Chordata Chordata Vertebrata Vertebrata Chondrichthyes Chondrichthyes
1
Scales
Present - #2: Elasmobranchii
Not present - ../Chimaeriformes/
2: Elasmobranchii
Open Gill position
Ventrally - ../Rajomorphii/
Laterally - ../Selachimorpha/