Homotypic Synonyms See Note

Basionym Name:
Spiloma gregarium var. dubium Hook., Engl. Fl., Mosses, Hepaticae, Lichens, Characeae and Algae (London) 5(1): 167 (1833)

Homotypic synonyms:
Arthonia cinnabarina f. dubia (Hook.) Leight., Lich.-Fl. Great Brit.: 399 (1871)
Arthonia gregaria f. dubia (Hook.) Willey, Syn. Gen. Arthonia: 7 (1890)
Arthonia gregaria var. dubia (Hook.) Mudd, Man. Brit. Lich.: 249 (1861)
Coniocarpon cinnabarinum var. dubium (Hook.) Leight., Ann. Mag. nat. Hist., Ser. 2 13(no. 78): 445 (1854)