Deltaherpeton hiemstrae (Bolt JR and Lombard RE 2010; FMNH PR 1637; Viséan, Early Carboniferous, 340 mya) was a basal colosteid, like Colosteus, nesting between Dvinosaurus and Greererpeton.

As in Dvinosaurus, the naris is inset from the skull margin, the skull is relatively tall. The anterior dentary teeth are giant fangs. Orignally the intertemporals were overlooked.

Colosteid traits unclude: premaxilla with small lateral fang; mandible with single elongate exomeckelian fenestra; pre-narial infraorbital lateral line terminating at ventral margin of premaxilla just anterior to external naris; and post-narial infraorbital lateral line terminating at the ventral margin of the maxilla just posterior to the external naris. Not all of these are visible here.