Tarachomylax oepiki was named by Barwick et al. (1997) [Exoskeleton cosmine-covered; ratio of Width Across Bones Y-Y to Total Skull Length is ca. 0.75, comparable with other Early Devonian genera; bones I not meeting behind bone B, leaving bone A in contact with B; bones C very variable, consisting of two to four separate bones; several D bones; no large E bones, and bones of the L-P series small and equidimensional; pineal foramen present; snout not heavily ossified and turned strongly ventrally; paired pit-lines on bone I; pit-line on bone B either short and asymmetrical, or in four short symmetrical sections, but not connected to the pit-line on J; lateral line canal in bone J; one or two Y bones present; the Y and the X bones together indicating a shorter cheek than in other Early Devonian genera; lateral line canal running from bone X to bone K; pores opening to lateral line canal few in number on most skull bones, but much more numerous on the snout. Overlapped area on scales with a band of tubercles adjacent to the cosmine-covered surface, and a band of distinctively porous bone anterior to that; cosmine on the scales with a distinct ridged pattern, the ridges being oriented longitudinally. Tooth plates almost fiat, and with 7-8 rows of teeth, the labial ones rapidly reaching their full size; palatal plates not fused in the mid-line; surface of plate between the most mesial tooth row and the median suture covered with irregularly shaped denticles; small number of similar denticles occupy labial parts of furrows between teeth; labial margins of plates showing new teeth added directly on to basal bone; each tooth bounded by a discrete and separate layer of enamel; worn teeth extend to the earliest-formed part of the plate, indicating absence of an independently growing cushion of dentine forming the heel of the plate; teeth composed of an enamel surface coating over a thin layer of pallial dentine; cores of teeth made of discrete columns composed of circumpulpal and interstitial dentine around rather regular pulp canals; no hypermineralised dentine.]. It is not extant. Its type specimen is Pi 1304, a partial skull. Its type locality is Tarachomylax-type locality, which is in an Emsian marine limestone in the Albanov Formation of the Russian Federation.