Perusta Egidi & Stielow, in Crous et al., Fungal Systematics and Evolution 3: 130 (2019).
Index Fungorum number: IF 805314; Facesoffungi number: FoF 06944, 1 morphological species (Species Fungorum 2022), no molecular data available.
Colonies growing up to 80 mm diam., on bare rock surface, black in reverse, greyish in obverse, darker near the margin, not uniform in colour, compact, hard, with irregular margins. Sexual morph: unknown. Asexual morph: Hyphae dark brown, septate, finely guttulate, with thick walls, consisting of round and chained cells with lateral germination. Conidiophores semi-macronematous. Conidiogenous cells intercalary. Conidia globose, catenate, dark brown (Adapted from Egidi et al. 2014).
Type species: Perusta inaequalis Egidi & Stielow
Notes: Perusta is characterised by black colonies which are compact, hard, with irregular margins with dark brown, septate, finely guttulate hyphae, semi-macronematous conidiophores, intercalary conidiogenous cells and catenate conidia. Perusta is unique in having unilaterally inflating conidium-like cells. Perusta is accommodated in Capnodiales genera incertae sedis based on multigene analyses of ITS and partial nucLSU, RPB2 and BT2 sequences (Egidi et al. 2014). More species with DNA sequence data is needed to confirm the placement of Perusta within Capnodiales. Molecular markers available for Perusta are SSU and ITS.
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