The type specimen was collected by the first author from Entre Ríos near Soledad (Burdett O'Connor Province) at an elevation of 1,700 m (5,600 ft).

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".

[2] Identifying features of Dictyomeridium lueckingi include an ecorticate and somewhat pruinose thallus, pyriform, partially-immersed, single, black and white-pruinose ascomata with eccentric, beaked ostioles, a distinct hamathecium, hyaline, amyloid, small somewhat muriform 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.

The morphologically similar species D. proponens and D. paraproponens can be distinguished from D. lueckingii by their larger spores.