Errolosteus

{{Short description|Extinct genus of arthrodire placoderm fishes}}

{{Speciesbox

| fossil_range = {{Fossil range|Emsian}}

| image = Errolosteus goodradigbeensis.jpg

| image_caption = Artist's reconstruction

| genus = Errolosteus

| parent_authority = Young, 1981

| species = goodradigbeensis

| authority = Young, 1981

}}

Errolosteus goodradigbeensis is an extinct buchanosteid arthrodire placoderm.{{Cite journal |last=Young |first=G.C. |date=1981-01-01 |title=New Early Devonian brachythoracids (placoderm fishes) from the Taemas - Wee Jasper region of New South Wales |url=https://doi.org/10.1080/03115518108566994 |journal=Alcheringa: An Australasian Journal of Palaeontology |volume=5 |issue=4 |pages=245–271 |doi=10.1080/03115518108566994 |issn=0311-5518}} Its fossils have been found in Emsian-aged marine strata of New South Wales, Australia.

The holotype of E. goodradigbeensis, ANU 21806, was described at the same time as its sympatric relative, Arenipiscis. Errolosteus can be distinguished by having a comparatively short, broad skull.