''Asterosteus'' is genus of
rhenanid
Rhenanida ("Rhine (fish)") is an order of scaly placoderms. Unlike most other placoderms, the rhenanids' armor was made up of a mosaic of unfused scales and tubercles. The patterns and components of this "mosaic" correspond to the plates of ar ...
placoderm from the
Eifelian. The type species, ''A. stenocephalus'', is known from an incomplete skull from Middle Devonian strata of
Ohio. What may be a second species ("''Asterosteus sp''
Schmidtt 1963") is described from fragments decorated with star-shaped tubercules from the Eifelian-aged Gebze beds of
Turkey.
References
Rhenanida
Placoderms of North America
Placoderms of Asia
Placoderm genera
Paleontology in Ohio
Eifelian life
{{placoderm-stub