Benneviaspidida

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.

Benneviaspidida Temporal range: 416–398 Ma PreꞒ Ꞓ O S D C P T J K Pg N Early Devonian
Life restoration of Boreaspis
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Infraphylum:	Agnatha
Superclass:	†Cephalaspidomorphi
Class:	†Osteostraci
Order:	†Benneviaspidida
Subgroups[1]
†Benneviaspis †Ectinaspis †Securiaspis †Boreaspidoidea †Hoelaspis †Severaspis †Boreaspididae †Belonaspis †Boreaspis †Spatulaspis †Tauraspis

Phylogeny

The cladogram below is adapted from Sansom (2009):^[1]

Benneviaspidida	Ectinaspis Securiaspis "Benneviaspis" longicornis "Benneviaspis" anglica "Benneviaspis" lankasteri Benneviaspis Boreaspidoidea Hoelaspis Severaspis "Boreaspis" ceratops "Boreaspis" intermedia Boreaspis Depranaspis Spatulaspis Belonaspis Hapilaspis Tauraspis