Buchanosteus

Buchanosteus Temporal range: Pragian–Emsian PreЄ Є O S D C P T J K Pg N
B. confertituberculatus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Placodermi
Order:	Arthrodira
Family:	Buchanosteidae White, 1952
Genus:	Buchanosteus Stensiö, 1945
Type species
Phlyctaenaspis australis var. confertituberculata Chapman, 1916
Species
B. confertituberculatus (Chapman, 1916) B. guangxiensis Wang, 2005 B. nuricus Mark-Kurik, 2004

Buchanosteus is an extinct genus of arthrodire placoderm. Its fossils have been found in Early Devonian-aged marine strata throughout Asia and Australia. It contains the following species:

• B. confertituberculatus, the type species, is known from several specimens found from the Emsian-aged Taemas-Weejasper Reef in what is now New South Wales, Australia. It coexisted sympatrically with other buchanosteid genera there.
• B. guangxianensis is known primarily from a well-preserved, albeit incomplete endocranium from Pragian-aged deposits near Guangxi, China. It is compared to another buchanosteid, the "giant" Exutaspis from the late Emsian Wuding Formation in Yunnan.
• B. nuricus is known from one or two specimens from Emsian strata in the Qaranghandy Region in Kazakhstan, and named for the Nura River. Is very similar in anatomy to B. confertituberculatus

References

Placoderms
Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Infraphylum: Gnathostomata
Major clades Acanthothoraci Antiarchi Arthrodira Petalichthyida Phlyctaeniida Phyllolepida Ptyctodontida Rhenanida
Basal placoderms Acanthothoraci* ?Hagiangellidae ?Hagiangella Palaeacanthaspidae* Arabosteus Dobrowlania Kimaspis Kolymaspis Kosoraspis Palaeacanthaspis Radotina Romundina ?Weejasperaspididae Weejasperaspis Murrindalaspis Rhenanida Asterosteus Bolivosteus Gemuendina Jagorina Nefudina Ohioaspis Others Brindabellaspis Pseudopetalichthys Stensioella Entelognathus
Antiarchi Basal antiarchs Minicrania Silurolepis Sinolepidae Dayaoshania Grenfellaspis Sinolepis Vanchienolepis Xichonolepis Yunnanolepiformes incertae sedis Heteroyunnanolepis Zhanjilepis Shimenolepis Chuchinolepidae Chuchinolepis Yunnanolepididae Parayunnanolepis Phymolepis Mizia Yunnanolepis Euantiarcha Asterolepidoidei Asperaspis Asterolepis Byssacanthus Gerdalepis Grossaspis Hunanolepis Kirgisolepis Pambulaspis Pterichthyodes Remigolepis Sherbonaspis Stegolepis Bothriolepidoidei Dianolepis Kirgisolepis Luquanolepis Nawagiaspis Tenizolepis Bothriolepididae Bothriolepis Briagalepis Grossilepis Monarolepis Vietnamaspis Jiangxilepididae Jiangxilepis Ningxialepis Microbrachiidae Hohsienolepis Microbrachius Wudinolepis
Petalichthyida Basal and incertae sedis Diandongpetalichthys Neopetalichthys Quasipetalichthyidae Quasipetalichthys Eurycaraspis Macropetalichthyidae Ellopetalichthys Epipetalichthys Lunaspis Macropetalichthys Notopetalichthys Shearsbyaspis Tongdzuylepis Wijdeaspis
Ptyctodontida Ptyctodontidae Austroptyctodus Campbellodus Chelyophorus Ctenurella Denisonodus Destnoporella Eczematolepis Goniosteus Materpiscis Palaeomylus Ptyctodopis Ptyctodus Rhamphodopsis Rhynchodus
Arthrodira Actinolepidoidei* Aethaspis Aleosteus Anarthraspis Baringaspis Bryantolepis Erikaspis Eskimaspis Heightingtonaspis Kujdanowiaspis Lataspis Lehmanosteus Mediaspis Proaethaspis Sigaspis Simblaspis Actinolepidae* Actinolepis Ailuracantha Bollandaspis Szeaspis Antarctaspidae* Antarctaspis Qataraspis Yujiangolepis Phyllolepida Austrophyllolepis Cowralepis Gavinaspis Phyllolepis Placolepis Wuttagoonaspidae Wuttagoonaspis Yiminaspis Phlyctaenioidei / Phlyctaenii* Phlyctaenididae Aggeraspis Cartieraspis Diadsomaspis Elegantaspis Neophlyctaenius Pageauaspis Phlyctaenius Arctaspididae Dicksonosteus Arctolepididae Arctolepis Heintzosteus Huginaspis Kueichowlepis Groenlandaspididae Africanaspis Boomeraspis Groenlandaspis Mithakaspis Mulgaspis Tiaraspis Turrisaspis Williamsaspididae Elvaspis Williamsaspis Brachythoraci Basal brachythoracids Antineosteus Gemuendenaspis Maideria Xiangshuiosteus Heterosteidae Herasmius Heterosteus Tollichthys Holonematidae Artesonema Belemnacanthus Bimbianga Deirosteus Deveonema Gyroplacosteus Holonema Megaloplax Rhenonema Tropidosteus Tropinema Homosteidae Angarichthys Cathlesichthys Dhanguura Euleptaspis Euleptaspis Luetkeichthys Migmatocephala Antineosteus Atlantidosteus Homosteus Taemasosteus Tityosteus Buchanosteidae Arenipiscis Buchanosteus Burrinjucosteus Errolosteus Goodradigbeeon Parabuchanosteus Toombsosteus Uralosteus Eubrachythoraci Coccosteomorphi Camuropiscidae Camuropiscis Fallacosteus Latocamurus Simosteus Rolfosteus Tubonasus Coccosteidae Belgiosteus Clarkeosteus Coccosteus Dickosteus Jiuchengia Livosteus Millerosteus Protitanichthys Watsonosteus Incisoscutidae Incisoscutum Plourdosteidae Compagopiscis Gogopiscis ?Kimberleyichthys Menamaraspis ?Plourdosteus Torosteidae Eldenosteus Harrytoombsia Torosteus Pachyosteomorphi Kiangyousteus Brachydeiridae Brachydeirus Oxyosteus Synauchenia Leptosteidae Leptosteus Rachiosteidae Rachiosteus Aspinothoracidi Bungartiidae Bungartius Dinichthyidae* Bruntonichthys Bullerichthys Dinichthys Kianyousteus Protitanichthys Squamatognathus Hadrosteidae Hadrosteus Leiosteidae Erromenosteus Mylostomatidae Dinomylostoma Kendrickichthys Mylostoma Tafilalichthys Selenosteidae Braunosteus Draconichthys Enseosteus Gymnotrachelus Melanosteus Microsteus Pachyosteus Paramylostoma Phymosteus Rhinosteus Selenosteus Stenosteus Walterosteus Titanichthyidae Titanichthys Trematosteidae Belosteus Brachyosteus Cyrtosteus Parabelosteus Trematosteus Dunkleosteoidea Panxiosteidae Janiosteus ?Kimberleyichthys Panxiosteus ?Plourdosteus Dunkleosteidae Dunkleosteus Eastmanosteus Golshanichthys Hussakofia Westralichthys
Related categories Placoderms Devonian fish