Kingdom Animalia Infraphylum Gnathostomata Suborder Brachythoraci Rank Superorder | Subphylum Vertebrata Class Placodermi Phylum Chordata Order Arthrodira | |
 | ||
Similar Arthrodira, Buchanosteus, Holonematidae, Taemasosteus, Heterosteidae | ||
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).
References
Brachythoraci Wikipedia(Text) CC BY-SA