Aspinothoracidi is a clade of placoderms, extinct armored fish most diverse during the Devonian. The gigantic apex predator Dinichthys, is the best-known member of this group. Many other genera, such as the infamous Dunkleosteus, were previously thought to be close relatives of Dinichthys and were grouped together in the family Dinichthyidae, though more recent studies have restricted that family to only its type species.[1]
Eubrachythoraci is divided into the clades Coccosteomorphi and Pachyosteomorphi, the latter of which can be further sub-divided into Aspinothoracidi and Dunkleosteoidea, as shown in the cladogram below:[2]
Millerosteus minor
Coccosteus cuspidatus
Dickosteus threiplandi
Watsonosteus fletti
Protitanichthys rockportensis
Plourdosteus canadensis
Panxiosteus ocullus
Janiosteus timanicus
Harrytoombsia elegans
Torosteus tuberculatus
Torosteus pulchellus
Mcnamaraspis kaprios
Compagopiscis croucheri
Trematosteus fontanellus
Incisoscutum ritchiei
Incisoscutum sarahae
Rolfosteus canningensis
Tubonasus lennardensis
Fallacosteus turneri
Camuropiscis laidlawi
Latocamurus coulthardi
Rhachiosteus pterygiatus
Eastmanosteus calliaspis
Eastmanosteus pustulosus
Kiangyousteus yohii
Golshanichthys asiatica
Westralichthys uwagedensis
Dunkleosteus raveri
Dunkleosteus terrelli
Dunkleosteus amblyodoratus
Heterosteus ingens
Yinosteus major
Tapinosteus heintzi
Bullerichthys fascidens
Kendrickichthys cavernosus
Bruntonichthys multidens
Dinichthys herzeri
Hadrosteus rapax
Gorgonichthys clarki
Heintzichthys gouldii
Pachyosteus bulla
Gymnotrachelus hydei
Stenosteus angustopectus
Brachyosteus dietrichi
Melanosteus occitanus
Rhinosteus parvulus
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