| 词条 | Exutaspis |
| 释义 |
| fossil_range = {{Fossil range|Emsian}} | image = | image_caption = | regnum = Animalia | phylum = Chordata | classis = †Placodermi | ordo = Arthrodira | familia = Buchanosteidae | familia_authority = White, 1952 | genus = Exutaspis | species = E. megista | binomial = Exutaspis megista | binomial_authority = Liu & Wang, 1981 }} Exutaspis megista is an extinct, "giant" buchanosteid arthrodire placoderm. Its fossils have been found in the Late Emsian-aged marine strata of the Jiucheng and Haikou Formations in Wuding, Yunnan. It was originally described as a phlyctaeniid. Later, after comparison with the Chinese Buchanosteus guanxianesis, Exutaspis was reappraised as a buchanosteid. The holotype, a "head roof," is {{convert|21|cm|in|abbr=on}} long. References{{Portal|Paleontology}}{{Placodermi|Ar.}}{{Taxonbar|from=Q16963387}}{{Placoderm-stub}} 2 : Buchanosteidae|Placoderms of Asia |
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