Buchanosteidae
Buchanosteidae is a family of arthrodire placoderms that lived from the Early to Middle Devonian.White, E. I. (1952). Australian arthrodires. ''Bulletin of the British Museum (Natural History) (Geology)'' 1: 249–304. Fossils appear in various strata in Russia, Central Asia, Australia, and China. All buchanosteids tend to have flattened (of varying degrees depending on the genus) heads, with most genera also having large orbits. Genera ''Arenipiscis'' From the Emsian of New South Wales, it is known from several scrappy remains. It had a narrow skull, and the dermal surfaces of the bony armor were covered in a pattern of fine, granular tubercles. ''Buchanosteus'' The type genus, species are found in Emsian-aged strata in Australia, China, and Kazakhstan. ''Burrinjucosteus'' A large buchanosteid from the Taemas-Weejasper Reef of Emsian-aged New South Wales, its skull roof suggests the living animal was fairly broad and flat. ''Errolosteus'' One of several Taemas-Weejasper buc ...
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