Leptopeltis Höhn., Ber. dt. bot. Ges. 35: 418 (1917).
MycoBank number: MB 2786; Index Fungorum number: IF 2786; Facesoffungi number: FoF 07970; 9 morphological species (Species Fungorum 2020), molecular data unavailable.
Type species: Leptopeltis filicina (Lib.) Höhn., Ber. dt. bot. Ges. 35: 422 (1917).
≡ Aulographum filicinum Lib., Pl. crypt. Arduenna, fasc. (Liège) 3(nos 201–300): no. 275 (1834).
Notes: Leptopeltis was introduced by von Höhnel (1917) and is typified by L. filicina (≡ Aulographum filicinum 1834). The genus is characterized by subcuticular or superficial, elongate or Y-shaped thyriothecia, opening with slit-like ostiole. The peridium is composed of a single layer of dark brown to black, isodiametric cells, which are paler at the base. Asci are 8-spored, bitunicate, cylindrical to cylindric-clavate, ellipsoidal to oblong, sessile, apically rounded, with an indistinct ocular chamber, raising in between broad, aseptate paraphyses and ascospores are fusiform, oblong to cylindrical, or sometimes falcate to reniform, hyaline, 0–3-septate (Hyde et al. 2013). The genus lacks a modern taxonomic treatment and molecular data to investigate its phylogenetic placement. The type species, L. filicina was collected from Asplenium felix-mas in Belgium and is currently treated as a synonym of Fouragea filicina (≡ Opegrapha filicina 1845) in Opegraphaceae (Index Fungorum 2020, accessed 8 June 2020). However, the basionym of Leptopeltis filicina was introduced earlier than the basionym of Fouragea filicina. We therefore, reinstate Leptopeltis based on its generic type being introduced earlier. The asexual morph of Leptopeltis was reported as coelomycetous, leptothyrium-like, forming in dimidiate or scutate pycnidial cavities, with small, one-celled conidia (von Arx and Müller 1975; Hyde et al. 2013; Wijayawardene et al. 2017b). However, the connection of the sexual and asexual morhs has not been proven (Fig. 110).
Species
Leptopeltis filicina