Protostomias

{{Automatic taxobox

| fossil_range = {{fossilrange|99.6|93.5|Lower Cenomanian}}

| taxon = Protostomias

| authority = Arambourg, 1933

}}

Protostomias is an extinct genus of prehistoric bony fish that lived during the lower Cenomanian.{{cite journal | last = Sepkoski | first = Jack | title = A compendium of fossil marine animal genera | journal = Bulletins of American Paleontology | volume = 364 |page=560 | year = 2002 | url = http://strata.ummp.lsa.umich.edu/jack/showgenera.php?taxon=611&rank=class | accessdate = 2009-02-27 }}