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We discuss the taxonomy of three species of Bacidia occurring in insular Laurimacaronesia. Two of them, B. amylothelia (Vain.) Vain. and B. endoleucoides (Nyl.) Zahlbr., which were previously described from Angola and Madeira, respectively, are found here to belong in Bacidia s. str. (Ramalinaceae). Modern descriptions and illustrations are provided for the first time. Bacidia amylothelia is similar to B. areolata Gerasimova & A. Beck, B. campalea (Tuck.) S. Ekman & Kalb, B. fusconigrescens (Nyl.) Zahlbr., B. heteroloma (Vain.) Zahlbr., B. millegrana (Taylor) Zahlbr. and B. suffusa (Fr.) A. Schneid. and is reported here from the Canary Islands. Bacidia endoleucoides is most likely to be confused with B. absistens (Nyl.) Arnold, B. friesiana (Hepp) Körb., B. salazarensis B. de Lesd. and B. caesiovirens S. Ekman & Holien and was found to be widely distributed in the Canary Islands and Azores in addition to Madeira. The third species, Bacidia deludens S. Ekman, Tønsberg & van den Boom, is described here as new to science. Bacidia deludens is characterised by a greyish, crustose thallus with whitish soralia, pale apothecia with crystals in the hymenium and proper exciple, acicular ascospores with 3–19 septa, and the production of fumarprotocetraric acid as the consistently present major substance. It is described here from the Canary Islands and Madeira. Although conservatively treated here in Bacidia, we argue that it is likely to belong in the Malmideaceae. An identification key to all known species of Bacidia s. str. in insular Macaronesia is provided. [ABSTRACT FROM AUTHOR]

Fellhaneropsis almquistiorum S. Ekman, a lichenized ascomycete in the family Pilocarpaceae (Lecanorales, Lecanoromycetes) is described as new to science. It is characterized by the thin and filmy crustose thallus, small photobiont, apothecia with a yellowish to black disk and well developed black margin that becomes excluded with age, dark green and brown pigmentation in the proper exciple and hypothecium, a hymenium without pigment or with some green and brown pigment, more or less fusiform and 3-septate ascospores, abundant black pycnidia, and long and filiform conidia. The species is currently known from central Sweden and central Germany, where it inhabits shaded and acid to neutral rocks with few competing lichens. Historical records were all misidentified as Bacidia coprodes or any of its synonyms or misapplied names. Some specimens of F. almquistiorum contain a previously unrecorded pigment, tentatively named here Almquistiorum-yellow. This pigment is intensely golden yellow in water, does not react with KOH and fades with the addition of HCl or HNO3. A key to all known, pycnidiate members of Fellhaneropsis is provided. [ABSTRACT FROM AUTHOR]