Brachythoraci

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

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.

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 elegans 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.

• Haaramo, Mikko (2005): Mikko's Phylogeny Archive: †Arthrodira. Version of 2005-NOV-15. Retrieved 2007-SEP-13.