A. elatior A. khaoyaiensis A. robusta A. terricola Aptrootia is a genus of fungi in the family Trypetheliaceae.

The genus was circumscribed by Robert Lücking and Harrie Sipman in 2007, with Aptrootia terricola assigned as the type species.

[3] Later molecular work showed that the species did not belong in Thelenella (Aptroot himself had expressed doubt about this generic placement), but rather, in the Trypetheliaceae, with a sister taxon relationship to a branch including Bathelium and a lineage containing Trypethelium floridanum.

The new genus name honours Aptroot, "in recognition of his numerous contributions to tropical lichenology".

[3] Species in genus Aptrootia have completely immersed perithecia with a brown-black ostiolar region.