C. amazonica C. cartilaginea C. humboldtii C. khaoyaiana C. macrocarpa Crustospathula is a genus of five species of crustose lichens in the family Malmideaceae.

This species was discovered by Aptroot in Madang Province, Papua New Guinea in an undisturbed tropical lowland rain forest.

Aptroot initially assigned the genus tentatively to the family Bacidiaceae, because of the resemblance of generative structures with certain species of Bacidia.

[1] It was later in the Ramalinaceae,[2] until molecular phylogenetic analysis determined that its true placement belonged in the Malmideaceae.

[3] Crustospathula species are crustose with stalked and cartilaginous soredia that are labriform (lip-shaped) or crenately (scalloped) lobed.