Basionym Name:Ionaspis tropica Aptroot, in Aptroot, Diederich, Sérusiaux & Sipman, Biblthca Lichenol. 64: 73 (1997)
Homotypic synonyms:Ionaspis aptrootii Poengs. & Lumbsch, in Poengsungnoen, Buaruang, Boonpragob & Lumbsch, Mycotaxon 136(2): 427 (2021)