Arenipiscis westolli is an extinct buchanosteid arthrodire placoderm. Its fossils have been found in Emsian-aged marine strata of the Murrumbidgee Group in New South Wales, Australia. The holotype specimen, ANU 35616, is an incomplete skull-roof.
The generic name, meaning "sand fish," refers to how the dermal surfaces of the armor have a pattern of tiny bumps, creating a granular texture.
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