Synonymy:
Verrucaria fissa Taylor, in Mackay, Fl. Hibern. (Dublin) 2: 95 (1836)
Endocarpon fissum (Taylor) Leight., Brit. Sp. Ang. Lich.: 20 (1851)
Thelotrema fissum (Taylor) Hepp, Flecht. Europ.: no. 103 (1853)
Sphaeromphale fissa (Taylor) Körb., Syst. lich. germ. (Breslau): 335 (1855)
Sphaeromphale lithina var. fissa (Taylor) Trevis., Conspect. Verruc.: 6 (1860)
Stigmatomma fissum (Taylor) Bagl. & Carestia, Comm. Soc. crittog. Ital. 2(fasc. 3): 419 (1867)
Polyblastia fissa (Taylor) Jatta, Syll. Lich. Ital. (Trano): 564 (1900)

Verrucaria lithina Ach., Methodus, Suppl. (Stockholmiæ): 18 (1803)
Pyrenula lithina (Ach.) Ach., Mag. Gesell. naturf. Freunde, Berlin 6(1): 24 (1814)
Endocarpon lithinum (Ach.) Leight., Brit. Sp. Ang. Lich.: 19 (1851)
Sphaeromphale lithina (Ach.) Trevis., Conspect. Verruc.: 6 (1860)
Dermatocarpon lithinum (Ach.) Arnold, Flora, Regensburg 44(34): 534 (1861)
Stigmatomma cataleptum var. lithinum (Ach.) Arnold, Flora, Regensburg 53(2): 19 (1870)
Sphaeromphale clopima f. lithinum (Ach.) Stein, in Cohn, Krypt.-Fl. Schlesien (Breslau) 2(2): 315 (1879)
Staurothele lithina (Ach.) Zahlbr., Cat. Lich. Univers. 1: 172 (1921) [1922]

Verrucaria umbrina Wahlenb., Fl. lapp.: 464 (1812)
Sphaeromphale umbrina (Wahlenb.) Mudd, Man. Brit. Lich.: 281 (1861)
Polyblastia umbrina (Wahlenb.) Rostr., Bot. Tidsskr. 4: 104 (1871) [1870-71]
Staurothele umbrina (Wahlenb.) Tuck., Gen. lich. (Amherst): 258 (1872)

Position in classification:
Staurothele, Verrucariaceae, Verrucariales, Chaetothyriomycetidae, Eurotiomycetes, Ascomycota, Fungi

Note:
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