Merismatium

Merismatium is a genus of lichenicolous (lichen-dwelling) fungi of uncertain familial placement in the order Verrucariales. The genus was circumscribed in 1898 by Friedrich Wilhelm Zopf.

Species
, Species Fungorum (in the Catalogue of Life) accepts six species of Merismatium. Host information is from Diederich et al. (2018).
 * Merismatium coccotremicola Etayo (2008) – host: Coccotrema
 * Merismatium corae (Pat.) Etayo & R.Sant. (2010) – host: Cora
 * Merismatium deminutum (Arnold) Cl.Roux & Nav.-Ros. (2002) – hosts: Polyblastia, Staurothele, Thelidium, Verrucaria
 * Merismatium nigritellum (Nyl.) Vouaux (1913) – hosts: Catapyrenium, Leptogium, Lichenomphalia, Lopadium, Micarea, Mycobilimbia, Ochrolechia, Protoblastenia
 * Merismatium peregrinum (Flot.) Triebel (1990) – host: Rimularia
 * Merismatium thamnoliicola Alstrup & E.S.Hansen (2001) – host: Thamnolia