Dictyomeridium lueckingii is a species of corticolous (bark-dwelling) lichen in the family Trypetheliaceae. Found in Bolivia, it was formally described as a new species in 2016 by Adam Flakus and André Aptroot. The type specimen was collected by the first author from Entre RÃÂos near Soledad (Burdett O'Connor Province) at an elevation of . It is only known to occur at the type locality, in the Tucumano-Boliviano montane forest. The species epithet honours German lichenologist Robert Lücking, "for his magnificent contribution to the knowledge of tropical lichens, on the occasion of his 50th birthday".
Identifying features of Dictyomeridium lueckingi include an ecorticate and somewhat pruinose thallus, , partially-immersed, single, black and white- ascomata with eccentric, beaked ostioles, a distinct , hyaline, amyloid, small somewhat ascospores, and the occurrence of the lichen product lichexanthone. The latter substance causes the thallus and ascomata surface to fluoresce yellow when lit with a long-wavelength UV light. Its ascospores are somewhat (divided into with 5âÂÂ6 transverse septa and 1âÂÂ2 longitudinal septa), and measure 25âÂÂ35 by 12âÂÂ17 üm. The morphologically similar species D. proponens and D. paraproponens can be distinguished from D. lueckingii by their larger spores.