''Wuttagoonaspis'' is a genus of primitive
arthrodire
Arthrodira (Greek for "jointed neck") is an order of extinct armored, jawed fishes of the class Placodermi that flourished in the Devonian period before their sudden extinction, surviving for about 50 million years and penetrating most marine eco ...
placoderms from Middle
Devonian Australia. The box-like skull is up to 18 centimeters in length, and the median dorsal plate averages in length about 10 centimeters.
References
Placoderms of Australia
Wuttagoonaspidae
{{Placoderm-stub