Brachythoraci

Brachythoraci is an extinct suborder of arthrodire placoderms, armored fish most diverse during the Devonian. The suborder previously only contained the infraorder Coccosteina, but the more basal family, Heterosteidae is now placed within there too.

Brachythoraci Temporal range: Devonian
Reconstruction of the coccosteine Coccosteus decipiens
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Placodermi
Order:	Arthrodira
Suborder:	Brachythoraci
Contained taxa
Family Heterosteidae Infraorder Coccosteina Family Williamsaspididae

Phylogeny

Below is a cladogram from Carr and Hlavin (2010).[1]

Arthrodira

Dicksonosteus arcticus   Brachythoraci   Holonema westolli       Homosteus       Buchanosteus confertituberculatus   Eubrachythoraci Coccosteomorphi   Coccosteus cuspidatus       Camuropiscis     Harrytoombsia       Pachyosteomorphi Dunkleosteoidea Panxiosteidae   Panxiosteus ocullus     Janiosteus timanicus     Dunkleosteidae   Eastmanosteus pustulosis       Eastmanosteus calliaspis       Golshanichthys asiatica       Westralichthys uwagedensis       Dunkleosteus terrelli     Dunkleosteus raveri     Dunkleosteus amblyodoratus               Aspinothoracidi   Rhinosteus parvulus       Gymnotrachelus hydei       Dinichthys herzeri       Heintzichthys gouldii       Gorgonichthys clarki     Hadrosteus rapax

References

1. Carr, R. K.; Hlavin, W. J. (2010). "Two new species of Dunkleosteus Lehman, 1956, from the Ohio Shale Formation (USA, Famennian) and the Kettle Point Formation (Canada, Upper Devonian), and a cladistic analysis of the Eubrachythoraci (Placodermi, Arthrodira)". Zoological Journal of the Linnean Society. 159: 195. doi:10.1111/j.1096-3642.2009.00578.x.