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Simblaspis Temporal range: Early Devonian: Pragian, 410–407 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Placodermi
Order:	†Arthrodira
Genus:	†Simblaspis Denison, 1958
Species
†Simblaspis cachensis Denison, 1958 (type)

Simblaspis is an extinct monospecific genus of arthrodire placoderm fish of the Early Devonian period. The type species Aleosteus eganensis was described in 1958, and was found in Pragian strata of the Qasr Limestone in Saudi Arabia.^[1]

It is one of the more basal members of the order Arthrodira, closely related to Aleosteus, as shown in the cladogram below:^[2]

Eurycaraspis incilis

Lunaspis broilii

Arthrodira

Yujiangolepis liujingensis

Antarctaspis mcmurdoensis

Wuttagoonaspidae

	Wuttagoonaspis fletcheri

	Yiminaspis shenme

	Aethaspis major

	Aethaspis utahensis

Lehmanosteus hyperboreus

	Aleosteus eganensis

	Simblaspis cachensis

	Kujdanowiaspis buczacziensis

	Kujdanowiaspis podolica

	Erikaspis zychi

	Sigaspis lepidophora

Eskimaspis heintzi

	Baringaspis dineleyi

	Proaethaspis ohioensis

Anarthraspis chamberlini

Heightingtonaspis anglica

Phyllolepida

Gavinaspis convergens

	Austrophyllolepis sp.

	Cowralepis mclachlani

	Phyllolepis orvini

	Placolepis budawangensis

Actinolepidae

Bollandaspis woschmidti

Actinolepis spinosa

	Actinolepis magna

	Actinolepis tuberculata

Bryantolepis brachycephalus

Phlyctaenioidei

Phlyctaeniidae

Groenlandaspidae

Arctaspidae	Dicksonosteus arcticus

	Arctolepidae

Brachythoraci

Actinolepidoidei

Phlyctaeniina

References

^ Denison, R. H. (1958). Early Devonian Fishes from Utah: Part III. Arthrodira. Chicago Natural History Museum.
^ Dupret, V.; Zhu, M. I. N.; Wang, J. N. Q. (2009). "The morphology of Yujiangolepis liujingensis (Placodermi, Arthrodira) from the Pragian of Guangxi (south China) and its phylogenetic significance" (PDF). Zoological Journal of the Linnean Society. 157: 70. doi:10.1111/j.1096-3642.2009.00519.x.

Arthrodira

Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Class: "Placodermi"

Gnathostomata

- see Gnathostomata

Placodermi

see Placodermi
Arthrodira	see below↓

Arthrodira

Wuttagoonaspidae

Wuttagoonaspis
Yiminaspis

Phyllolepida

Gavinaspis
Phyllolepididae	Austrophyllolepis Cobandrahlepis Cowralepis Phyllolepis Placolepis Yurammia

Actinolepidae

Phlyctaenioidei

Dicksonosteus
Phlyctaeniidae	Aggeraspis Arctaspis Barwickosteus Cartieraspis Diadsomaspis Elegantaspis Gaspeaspis Grifftaylor Heterogaspis Huginaspis Kolpaspis Kueichowlepis Lyhoalepis Neophlyctaenius Pageauaspis Phlyctaenius Prosphymaspis Stipatosteus
Arctolepididae	Arctolepis Heintzosteus Huginaspis? Kueichowlepis?
Groenlandaspididae	Africanaspis Boomeraspis Cosmacanthus Groenlandaspis Mithakaspis Mulgaspis Tiaraspis Turrisaspis
Williamsaspididae	Elvaspis Williamsaspis

Brachythoraci

Holonematidae

Homostiidae

Angarichthys Cathlesichthys Dhanguura? Euleptaspis Euleptaspis Luetkeichthys
Migmatocephala	Antineosteus Atlantidosteus Homosteus Tityosteus

Buchanosteidae

Eubrachythoraci

- see below↓

Eubrachythoraci

Coccosteomorphi

Coccosteoidea

Coccosteidae	Belgiosteus Clarkeosteus Coccosteus Dickosteus Jiuchengia Livosteus Millerosteus Protitanichthys Watsonosteus
Panxiosteidae	Janiosteus Kimberleyichthys? Panxiosteus Plourdosteus?

Incisoscutoidea

Belosteus? Compagopiscis Cyrtosteus? Harrytoombsia? Mcnamaraspis? Parabelosteus? Torosteus Trematosteus
Camuropiscidae	Camuropiscis Fallacosteus Incisoscutum Latocamurus Rolfosteus Tubonasus

Pachyosteomorphi

Leptosteus
Rhachiosteus

Dunkleosteoidea

Dunkleosteus Eastmanosteus Golshanichthys Hussakofia Kiangyousteus Westralichthys Xiangshuiosteus?
Heterosteidae	Herasmius Heterosteus Yinostius

Aspinothoracidi

Bruntonichthys Bullerichthys Bungartius Dinichthys Dinomylostoma Erromenosteus Hadrosteus Holdenius Kendrickichthys Mylostoma Squamatognathus Tafilalichthys Tapinosteus Titanichthys
Brachydeiridae	Brachydeirus Oxyosteus Synauchenia
Selenosteidae	Alienacanthus Amazichthys Brachyosteus Braunosteus Draconichthys Enseosteus Gorgonichthys Gymnotrachelus Heintzichthys Melanosteus Microsteus Pachyosteus Paramylostoma Phymosteus Rhinosteus Selenosteus Stenosteus Walterosteus

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