Kosmimatomyces Bianchin., Reinoso-Fuentealba, Rodr.-Andr., Cano & Stchigel, in Crous et al., Persoonia 44: 403 (2020).
Index Fungorum number: IF 836058; Facesoffungi number: FoF 11049, 1 morphological species (Species Fungorum 2022), no molecular data available.
Saprobic in soil. Sexual morph: Unknown. Asexual morph: Mycelium consisting of branched, septate, pale to dark brown, thick-walled hyphae, sometimes coarsely ornamented. Conidiophores solitary, macronematous or semi-macronematous, erect, straight to flexuous, hyaline to dark brown, thick- and smooth- to rough-walled, cylindrical, narrow, branched or not, branches terminal and lateral, in angles of 45–90°. Conidiogenous cells determinate, integrated, terminal and intercalary, mono- or polyblastic, pale to dark brown, verrucose, scars truncate. Conidia holoblastic, 0–1-septate, brown to dark brown, thick-walled, globose, ovoid or ellipsoid, ornamented with spines and crater-like warts, with dark scars at one or both ends, arranged in branching acropetal chains (Adapted from Crous et al. 2020).
Type species: Kosmimatomyces alatophylus Bianchin., Reinoso-Fuentealba, Rodr.-Andr., Cano & Stchigel
Notes: Kosmimatomyces is characterised by pale to dark brown, thick-walled hyphae, macronematous or semi-macronematous, erect conidiophores, intercalary, mono- or polyblastic, pale to dark brown conidiogenous cells and holoblastic, 0–1-septate, brown to dark brown, thick-walled, globose, ovoid or ellipsoid conidia. Kosmimatomyces differs from Leptoxyphium in that the latter has pycnidial conidiomata with a bulbous swollen base and cylindrical neck that enlarges at the apex becoming funnel-shaped, while Kosmimatomyces has only a single conidiophore. Kosmimatomyces is morphologically and phylogenetically a distinct genus in Capnodiaceae. Molecular markers available for Kosmimatomyces include LSU and ITS sequence data.