Full reference: P. Tarrant. 1991. The ostracoderm Phialaspis from the Lower Devonian of the Welsh Borderland and South Wales. Palaeontology 34:399-438
Parent taxon: Heterostraci according to P. Tarrant 1991
Sister taxa: Amphiaspidiformes, Aporemaspis, Ariaspididae, Aserotaspis, Cardipeltida, Cardipeltidae, Cardipeltiformes, Ceraspidae, Corvaspidida, Corvaspidiformes, Cyathaspida, Cyathaspidiformes, Drepanaspidae, Guerichosteidae, Lepidaspidida, Lepidaspidiformes, Munchoaspis, Olbiaspidida, Palaeaspidi, Protaspidae, Psammolepis, Psammosteiformes, Pteraspidi, Pteraspidiformes, Strosipherus, Tesseraspidida, Tesseraspidiformes, Tolypelepidida, Tolypelepidiformes, Toombsaspis, Traquairaspidida, Traquairaspidiformes, Aspidosteus, Obliaspis, Gunaspis, Seretaspis, Archodus, Clydonaspis, Ennosviaspis, Alainaspis, Karelosteus, Dyreaspis, Athenaegis, Kiangsuaspis, Homaspidella, Pilolepsis, Anatolepsis, Schizosteus, Yoglinia, Pycnaspis, Listraspis, Allocryptaspis, Palaeodus, Asketaspis, Corveolepis, Irregulariaspis, Strophisterus, Pionaspis, Grumantaspis, Steinaspis, Poriferaspis
Subtaxa: Rimasventeraspis angusta Rimasventeraspis septentrionalis
Ecology:
Distribution: found only at Beaver River ( of Yukon)
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.