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Brachythoraci

Extinct suborder of fishes From Wikipedia, the free encyclopedia

Brachythoraci is an extinct suborder of arthrodire placoderms, armored fish most diverse during the Devonian.

Phylum:Chordata
Class:†Placodermi
Order:†Arthrodira
Quick facts Scientific classification, Contained taxa ...
Brachythoraci
Temporal range: Devonian
Dunkleosteus and Titanichthys skulls in Wyoming Dinosaur Center
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Chordata
Class: †Placodermi
Order: †Arthrodira
Clade: †Phlyctaenioidei
Suborder: †Brachythoraci
Gross, 1932
Contained taxa
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Phylogeny

Arthrodira is divided into three main groups: the paraphyletic Actinolepida and Phlyctaenii, and then the monophyletic Brachythoraci. Brachythoraci is then further divided into the large derived clade Eubrachythoraci and several basal groups: Buchanosteoidea, Homosteidae, and Holonematidae.[1] (Although Holonematidae's membership in Brachythoraci is disputed.)[2]

Below is a cladogram from the 2016 Zhu et al. phylogenetic study:[2]

Phlyctaenioidei

Elvaspis tuberculata

Dicksonosteus arcticus

Turrisaspis elektor

Groenlandaspis antarcticus

Holonema westolli

Brachythoraci
Homostiidae
Buchanosteoidea

Dhanguura johnstoni

Gemuendenaspis angusta

Xiangshuiosteus wui

Eubrachythoraci
Coccosteomorphi
Pachyosteomorphi
"Phlyctaenii"

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