Aethaspis is an extinct genus of arthrodire placoderm fish from the Devonian period.

Two species were described by Denison in 1958: Aethapsis major and Aethapsis utahensis.

[1] It is one of the more basal members of the order Arthrodira, as shown in the cladogram below: [2] Eurycaraspis incilis Lunaspis broilii Yujiangolepis liujingensis Antarctaspis mcmurdoensis Wuttagoonaspis fletcheri Yiminaspis shenme Aethaspis major Aethaspis utahensis Lehmanosteus hyperboreus Aleosteus eganensis Simblaspis cachensis Kujdanowiaspis buczacziensis Kujdanowiaspis podolica Erikaspis zychi Sigaspis lepidophora Eskimaspis heintzi Baringaspis dineleyi Proaethaspis ohioensis Anarthraspis chamberlini Heightingtonaspis anglica Gavinaspis convergens Austrophyllolepis sp.

Cowralepis mclachlani Phyllolepis orvini Placolepis budawangensis Bollandaspis woschmidti Actinolepis spinosa Actinolepis magna Actinolepis tuberculata Bryantolepis brachycephalus Phlyctaeniidae Groenlandaspidae Dicksonosteus arcticus Arctolepidae Brachythoraci

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