Benneviaspidida is an order of osteostracan jawless fishes which lived in the Early Devonian. The fishes in this order have a flat headshield and are dorsoventrally depressed. The first canal to lateral sensory field bifurcates near the orbit.
Phylogeny The cladogram below is adapted from Sansom (2009):
References
External links Benneviaspidida at Palaeos Osteostraci by Philippe Janvier Osteostraci at Mikko's Phylogeny Archive Early Devonian osteostracans from Russia