Flagellostrigula Lücking, S.H. Jiang & Sérus. gen. nov.

MycoBank number: MB 836389; Index Fungorum number: IF 836389; Facesoffungi number: FoF 08874;

 one morphologically delimited species (this paper); molecular data not available.

Lichenized on bark in terrestrial, (sub-)tropical habitats. Thallus corticate, greenish. Photobiont Trentepohlia. Sexual morph: Ascomata unknown. Asexual morph: Pycnidia common, prominent, hemisphaerical to wart-shaped, rather large (up to 0.8 mm diam.), covered by rather thick thalline layer. Conidia typically acrogenous, only macroconidia known; macroconidia 1-septate, broadly bacillar, with long and thin (15–35 × 1 µm) gelatinous appendage at one end only, hyaline.

Chemistry: No secondary substances known.

Type species: Flagellostrigula laureriformis (Aptroot & Lücking) Lücking, S.H. Jiang & Sérus. (see below).

Notes:This new genus is established for an oddball that agrees with Dichoporis in its 1-septate macroconidia. Flagellostrigula laureriformis is only known through pycnidia producing macroconidia, which differ from Dichoporis and other genera in having only a single, very long, name-giving flagelliform appendage at the proximal end, about 3–4 times as long as the conidia (Aptroot et al. 2008; Jiang et al. 2016; Cáceres et al. 2017). In addition, the pycnidia are unusually large and covered by a rather thick thalline layer. The single species is with certainty known from the Neotropics only (Costa Rica, Brazil; Aptroot et al. 2008; Cáceres et al. 2017). The report from China (Jiang et al. 2016) may represent an additional species, given the slightly deviating morphology of the pycnidia.