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Page number:69 
Remarks (internal):So far M. sanguinarius is the only Mycoblastus species known from South Korea. It has often been confused with M. sanguinarioides Kantvilas, which differs in rather thin, smooth thallus and its distribution in the Southern Hemisphere (Tasmania, Australia). The related species M. affinis (Schaer.) T. Schauer differs by lacking red pigment at the apothecial base, smaller spores (less than 70 µm), and the presence of planaic acid. 
Description type:Non-original description 
Description:Mycoblastus sanguinarius (L.) Norman, Cat. Lich. Univers. 4: 5, 1926 Fig. 2B
? Lichen sanguinarius L., Sp. pl. 2: 1140, 1753
Thallus corticolous, thick, verrucose or papillose-warted, continuous to ± cracked, gray. Prothallus present, grayish-black. Hypothecium carmine to blood-red. Apothecia numerous, 0.3-1.2 mm diam., appressed or sessile leaving a bright carmine-red spot when damaged, convex, black. Asci 1-spored. Spores hyaline, broadly ellipsoid, 70-84 x 30-40 µm. Pycnidia not seen. For further descriptions see Smith et al. (2009) and Kantvilas (2009).
Chemistry - Spot test reactions: thallus K+ yellow, C-, KC-, P+ yellow. Secondary metabolites: atranorin and caperatic acid.
Ecology & distribution - The collections were found growing over Acer bark and siliceous rocks at 1160-1530 m. Known also from Asia, Africa, Europe, Macaronesia, and North America (Smith et al. 2009, Kantvilas 2009).

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