Kujdanowiaspis is an extinct genus of arthrodire placoderm fish from the Early Devonian of Podolia (Ukraine), Poland and Spain.

[4][5] Kujdanowiaspis is one of the more basal members of the order Arthrodira, as shown in the cladogram below:[7] 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.

What is known about it is typical of actinolepid placoderms, and it can compared to the better known primitive arthrodires such as Dicksonosteus or Actinolepis.

[4] The body of Kujdanowiaspis is slightly wider than high, with large spinal plates protruding laterally, suggesting a benthic lifestyle.

[5] Its jaws were comparatively underdeveloped in comparison to the more robust-jawed arthrodires that would come after it, such as Dunkleosteus and Coccosteus, indicating that it likely subsisted primarily on smaller, softer-bodied animals such as mollusks or worms instead of larger, tougher prey animals.