Camposporium
Camposporium Harkn., Bull. Calif. Acad. Sci. 1(no. 1): 37 (1884).
Index Fungorum number: IF 7479; Facesoffungi number: FoF 08296, 24 morphological species (Species Fungorum, 2022), 8 species with molecular data.
Saprobic on host. Sexual morph: Unknown. Asexual morph: Colonies effuse, cottony, greyish brown, velvety. Conidiophores mononematous, sometimes fasciculate in groups of 6–10, erect, straight to flexuous, 1–5-septate, simple, smooth, brown, paler towards the apex. Conidiogenous cells monoblastic, terminal, sometimes becoming intercalary, integrated, truncate at the apex. Conidia holoblastic, solitary, dry, aerogenous, cylindrical, obtuse at the apex, truncate at the base, 7–9-euseptate, sometimes slightly constricted at the septa, smooth, pale brown, with the apex thicker and dark brown, apical cell bearing 1−2 divergent aseptate, hyaline, unbranched, straight or curved, appendages (adapted from Bhat and Sutton 1985).
Type species: Camposporium antennatum Harkn.
Notes: Camposporium is characterised by effuse, cottony, greyish brown, velvety colonies, mononematous conidiophores, monoblastic, terminal conidiogenous cells and holoblastic, solitary, dry, aerogenous conidia. Hughes (1951) revised Camposporium and accepted four species. Several authors added new species to Camposporium (Rao and Rao 1964; Dudka 1966; Ichinoe 1971; Matsushima 1971; Shearer 1974; Ellis 1976; Abdullah 1980; Mercado et al. 1995; Castañeda 1997; Whitton et al. 2002; Thakur et al. 2014; Adamčík et al. 2015; Hyde et al. 2020). Tian et al. (2015) did not consider Camposporium in their phylogenetic study of Melanommataceae. Crous et al. (2018) reported that Camposporium antennatum is closely related to Fusiconidium lycopodiellae in Melanommataceae based on megablast search using the ITS sequence of Fusiconidium lycopodiellae. Hyde et al. (2020) added all the strains of Camposporium in their multi-gene phylogenetic analyses based on LSU, SSU, ITS and TEF1-α sequence data and reported that Camposporium and Fusiconidium grouped together within Melanommataceae. The authors confirmed the phylogenetic placement of Camposporium in Melanommataceae. They also provided the combination C. lycopodiellae for Fusiconidium lycopodiellae. Camposporium differs from Fusiconidium in having different conidiogenesis cells and conidial shape. Camposporium is morphologically and phylogenetically a distinct genus in Melanommataceae. Molecular markers available for Camposporium include LSU, SSU, ITS and TEF1.
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