Synonymy:
Arthonia spadicea Leight., Ann. Mag. nat. Hist., Ser. 2 13(no. 78): 442 (1854)
Arthonia lurida var. spadicea (Leight.) Nyl., Mém. Soc. Imp. Sci. Nat. Cherbourg 4: 92 (1856)
Coniangium spadiceum (Leight.) Arnold, Verh. Kaiserl.-Königl. zool.-bot. Ges. Wien 23: 507 (1873)
Coniocarpon spadiceum (Leight.) Arnold, Verh. Kaiserl.-Königl. zool.-bot. Ges. Wien 23: 507 (1873)
Opegrapha spadicea (Leight.) M. Choisy, Bull. mens. Soc. linn. Soc. Bot. Lyon 19(1): 10 (1950)

Position in classification:
Diarthonis, Arthoniaceae, Arthoniales, Arthoniomycetidae, Arthoniomycetes, Ascomycota, Fungi

Note:
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