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- Protopteraspis abstract "Protopteraspis is an extinct genus of agnathan known from fossil finds in North America, Europe, and Australia. It lived from the Late Silurian to the Early Devonian. The animal's somewhat flat build has led some to believe that it was a bottom dweller, living in freshwater areas. It has been described as "somewhat unspecialized". Its snout was round and narrow, shorter than that of its immediate relatives. Protopteraspis also did not possess the cornua (horns) found on the headshields of other pterapsids; rather, it had "small points" behind the gill opening. It did possess a "medium-sized" dorsal spine. Plates covering the headshield had ridges of dentine. It is theorized that the headshield formed in youth and that it grew via growth of the plates, which fused in adulthood. The scales of the animal were "small and diamond shaped".".
- Protopteraspis class Pteraspidomorphi.
- Protopteraspis class Cyathaspidiformes.
- Protopteraspis family Protopteraspididae.
- Protopteraspis kingdom Animal.
- Protopteraspis order Pteraspidiformes.
- Protopteraspis phylum Chordate.
- Protopteraspis wikiPageID "35348918".
- Protopteraspis wikiPageRevisionID "552426002".
- Protopteraspis classis "†Pteraspida".
- Protopteraspis familia "†Protopteraspididae".
- Protopteraspis genus "†Protopteraspis".
- Protopteraspis hasPhotoCollection Protopteraspis.
- Protopteraspis name "Protopteraspis".
- Protopteraspis ordo "†Pteraspidiformes".
- Protopteraspis phylum Chordate.
- Protopteraspis regnum "Animalia".
- Protopteraspis subclassis "†Cyathaspidiformes".
- Protopteraspis superclassis "†Pterapsidomorphi".
- Protopteraspis subject Category:Devonian_fish.
- Protopteraspis subject Category:Freshwater_fish.
- Protopteraspis subject Category:Prehistoric_fish_of_Australia.
- Protopteraspis subject Category:Prehistoric_fish_of_Europe.
- Protopteraspis subject Category:Prehistoric_fish_of_North_America.
- Protopteraspis subject Category:Silurian_fish.
- Protopteraspis subject Category:Vertebrates_without_jaws.
- Protopteraspis type AnimalTissue105267548.
- Protopteraspis type BodyPart105220461.
- Protopteraspis type Bone105269901.
- Protopteraspis type ConnectiveTissue105286536.
- Protopteraspis type Jaw105546040.
- Protopteraspis type Part109385911.
- Protopteraspis type PhysicalEntity100001930.
- Protopteraspis type Thing100002452.
- Protopteraspis type Tissue105267345.
- Protopteraspis type VertebratesWithoutJaws.
- Protopteraspis type Animal.
- Protopteraspis type Eukaryote.
- Protopteraspis type Species.
- Protopteraspis type Organism.
- Protopteraspis comment "Protopteraspis is an extinct genus of agnathan known from fossil finds in North America, Europe, and Australia. It lived from the Late Silurian to the Early Devonian. The animal's somewhat flat build has led some to believe that it was a bottom dweller, living in freshwater areas. It has been described as "somewhat unspecialized". Its snout was round and narrow, shorter than that of its immediate relatives.".
- Protopteraspis label "Protopteraspis".
- Protopteraspis sameAs m.0j9ng2k.
- Protopteraspis sameAs Q7252096.
- Protopteraspis sameAs Q7252096.
- Protopteraspis sameAs Protopteraspis.
- Protopteraspis wasDerivedFrom Protopteraspis?oldid=552426002.
- Protopteraspis isPrimaryTopicOf Protopteraspis.
- Protopteraspis name "Protopteraspis".