[2][3] It consists of the single species Callome multipartita, a saxicolous (rock-dwelling), crustose lichen found in Northern Africa, Europe, and North America.

It went through several genus changes in its taxonomic history,[1] until Mónica Andrea García Otálora and Mats Wedin circumscribed Callome in 2013 to contain it.

[5] Reproductive structures called conidiomata are commonly found within the thallus and are typically immersed in the surface.

The apothecia have a dark brown disc that is flat to slightly convex, surrounded by a thick, often crenulated or lobed margin.

[6] Callome multipartita is known to occur in Northern Africa, Europe, and North America, where it grows on rocks.