D. amylosporum D. campylothelioides D. immersum D. isohypocrellinum D. lueckingii D. neureuterae D. paraproponens D. proponens D. tasmanicum Dictyomeridium is a genus of corticolous (bark-dwelling), crustose lichens in the family Trypetheliaceae.

The genus was circumscribed in 2016 by lichenologists André Aptroot, Matthew Nelson, and Robert Lücking, with Dictyomeridium proponens assigned as the type species.

[3] Dictyomeridium is distinguished from other genera in the family Trypetheliaceae by its muriform (multichambered) ascospores, the lateral ostioles of its ascomata, and several subtle microscopic differences in the form of the hamathecium and the ascospores.

Dictyomeridium species are distinguished from each other by their reaction to the UV test, the dimensions of their spores, and by the presence or absence of a red pigment in their ostioles.

All species lack a cortex, and have conical to pyriform ascomata with eccentric (i.e., not placed centrally) ostioles.