Basionym Name:Psorothecium ikomae Yasuda ex Räsänen, J. Jap. Bot. 16: 150 (1940)
Homotypic synonyms:Megalospora ikomae (Yasuda ex Räsänen) M. Satô, Index Plantarum Nipponicarum, IV Lichenes: 116 (1943)