Hueidea – a genus to host former Huea species (Teloschistaceae, lichenized Ascomycota)

The name Huea, used for a lichen genus which hosts the two common Antarctic species H. cerussata and H. grisea (= H. coralligera), was formally recommended for rejection by the Nomenclature Committee for Fungi. Based on molecular data, we transfer these two species to the genus Hueidea. Hueidea was originally described in the family Fuscideaceae for the single alpine Australian endemic species Hueidea australiensis. However, our molecular data show it belongs to the Teloschistaceae and we here transfer it to that family. Two additional species, Huea sorediata and Caloplaca coeruleofrigida from Antarctica are also transferred to Hueidea and a new species, H. austroaquatica, is described from the Kerguelen Islands. The acetone-insoluble pigment, which occurs at different concentrations in the apothecia of all Hueidea species, is shown to be cinereorufa-green. Hueidea coeruleofrigida is the only species in the genus known to produce anthraquinones in the apothecia.