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, Psammolepis, Psammosteiformes, Pteraspidi, Pteraspidiformes, Strosipherus, Tesseraspidida, Tesseraspidiformes, Tolypelepidida, Tolypelepidiformes, Toombsaspis, Traquairaspidida, Traquairaspidiformes, Kiangsuaspis, Gunaspis, Asketaspis, Listraspis, Pionaspis, Athenaegis, Alainaspis, Grumantaspis, Clydonaspis, Pycnaspis, Dyreaspis, Poriferaspis, Strophisterus, Anatolepsis, Yoglinia, Ennosviaspis, Schizosteus, Irregulariaspis, Corveolepis, Karelosteus, Steinaspis, Homaspidella, Seretaspis, Pilolepsis, Obliaspis, Allocryptaspis, Archodus
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.