Basionym Name:Leptogium pusillum var. aquale Arnold, Verh. Kaiserl.-Königl. zool.-bot. Ges. Wien 23: 489 (1873)
Homotypic synonyms:Leptogium aquale (Arnold) P.M. Jørg., [as 'aequale'] Lichenologist 26(1): 1 (1994)Leptogium pusillum f. aquale (Arnold) Arnold, Verh. Kaiserl.-Königl. zool.-bot. Ges. Wien 30: 150 (1881)Scytinium aquale (Arnold) Otálora, P.M. Jørg. & Wedin, Fungal Diversity 64(1): 290 (2013)