Artiopoda - Asaphida - Nileidae
Parent taxon: Nileidae according to O. A. Hoel 1999
See also Jell and Adrain 2002 and Sepkoski 2002
Sister taxa: Aocaspis, Barrandia, Berkutaspis, Borthaspidella, Bumastides, Elongatanileus, Homalopteon, Illaenopsis, Kodymaspis, Lakaspis, Neopsilocephalina, Nileidae stenorhachis, Nileus, Parabarrandia, Paraperaspis, Peraspis, Petrbokia, Platypeltoides, Poronileus, Psilocephalinella, Shenjiawania, Symphysurina, Symphysurus
Subtaxa: Varvia breviceps
Type: Symphysurus breviceps
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Billingen of Sweden (2 collections)
• Arenig of Sweden (4)
• Ordovician of Norway (2), Sweden (5), United States (1: Nevada)
Total: 14 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.