Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
Superclass of jawless fish
|
| gptkbp:characteristic |
cartilaginous skeleton
lack jaws lack paired fins |
| gptkbp:circulatorySystem |
closed
|
| gptkbp:evolutionarySignificance |
earliest vertebrates
|
| gptkbp:extant_groups |
gptkb:hagfish
lampreys |
| gptkbp:extinct_groups |
ostracoderms
|
| gptkbp:fossil |
gptkb:Cambrian_period
gptkb:Devonian_period |
| gptkbp:habitat |
gptkb:marine
freshwater |
| https://www.w3.org/2000/01/rdf-schema#label |
Agnathans
|
| gptkbp:kingdom |
gptkb:Animalia
|
| gptkbp:notable_member |
gptkb:Petromyzontida
gptkb:Myxini |
| gptkbp:phylum |
gptkb:Chordata
|
| gptkbp:reproduction |
external fertilization
|
| gptkbp:respiration |
gills
|
| gptkbp:subfamily |
gptkb:Vertebrata
|
| gptkbp:bfsParent |
gptkb:Ordovician_biota
|
| gptkbp:bfsLayer |
8
|