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Buchanosteus : ウィキペディア英語版 | Buchanosteus
''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==
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