A monogeneric elateroid family Iberobaeniidae is endemic to the Iberian Peninsula. Two species of Iberobaenia Bocak, Kundrata, Andújar & Vogler, 2016 were formally described from Jaén and Murcia, and unidentified larvae were reported from Sierra de Cabra in Córdoba. Recent collecting effort yielded males conspecific with the earlier reported larvae and we describe these males as I. andujari sp. nov. We evaluate the genetic and morphological differentiation within Iberobaenia and illustrate male genitalia which provide principal morphological diagnostic characters. The new species differs in the shape of the prothorax and male genitalia. Moreover, its status is supported by the high genetic divergence of the cytochrome c oxidase subunit I mtDNA fragment. We provide detailed data on the distribution and ecology of Iberobaenia and the identification key to adult males.