| Compagopiscis
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | †Placodermi |
| Order: | †Arthrodira |
| Suborder: | †Brachythoraci |
| Clade: | †Eubrachythoraci |
| Clade: | †Coccosteomorphi |
| Superfamily: | †Incisoscutoidea |
| Genus: | †Compagopiscis Gardiner & Miles, 1994 |
| Species | |
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Compagopiscis is an extinct genusofplacoderm known from the Gogo Formation. It lived in the Upper Devonian (Frasnian stage) of Western Australia.[1] The genus is monotypic, with its only species being Compagopiscis croucheri.[2]
Compagopiscis is one of the earliest known vertebrates to have teeth.[3] An analysis of its bite force suggests that it was a generalist predator, having a diverse diet.[4] Fossils have been found in numbers, suggesting possible schooling behavior.[4]
Compagopiscis was originally classified as a member of the family Plourdosteidae.[5] However, phylogenetic analysis later found Plourdosteidae to be an invalid grouping, and the family was dismissed.[6] Torosteus is now considered to be a member of the superfamily Incisoscutoidea, which belongs to the clade Coccosteomorphi, one of the two major clades within Eubrachythoraci. The cladogram below shows the phylogenyofCompagopiscis:[7]
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| Compagopiscis |
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