Chevalieropsis
Chevalieropsis G. Arnaud, Annls Épiphyt. 9: 2 (1923).
Index Fungorum number: IF 992; Facesoffungi number: FoF 07894, 1 morphological species (Species Fungorum 2022), no molecular data available.
Parasitic on living leaves. Sexual morph: Stromata up to 1 mm diameter, comprising more than 10 ascomata, clustered to solitary, semi-immersed and thick at the base, asexual morph possibly associated with dark brown conidiophores, minutely multi-denticulate, with subglobose and hyaline, septate, unbranched conidia, pale at the apex, and darkened and wider at the base. Ascomata superficial, grouped, subglobose, uniloculate, dark brown, formed in a stroma, with a subiculum, slightly substipitate, thickened base. Peridium comprising hyaline to dark brown cells of textura angularis. Asci 8-spored, bitunicate, obovoid, obpyriform to clavate, sessile or with short pedicel, thick-walled and multi-layer at the apex, with small ocular chamber. Ascospores 2–3- seriate, obovoid, apex wider, narrower towards the lower and pointed base, 1–4-septate, slightly constricted at the septum, hyaline to pale brown or reddish-brown, sometimes guttulate, slightly verruculose. Asexual morph: Septoidium sp. (adapted from Boonmee et al. 2017).
Type species: Chevalieropsis ctenotricha (Pat. & Har.) G. Arnaud
Notes: Chevalieropsis is characterised by clustered to solitary, semi-immersed stromata, obovoid, obpyriform to clavate, sessile asci and 2–3- seriate, obovoid, 1–4-septate ascospores. Moreau and Moreau (1955) recognized two kinds of asexual conidia associated with C. ctenotricha on leaves of Daniella oliveri (Detarioideae) which resembles members of Septoidium. Sivanesan (1984) re-studied and described C. ctenotricha and its asexual conidia. He pointed out that Chevalieropsis differs from Perisporiopsis lophirae in the number of septa. Eriksson (1999) treated Chevalieropsis in Parodiopsidaceae, order incertae sedis. Hyde et al. (2013) revised Parodiopsidaceae and accepted species which occur on living leaf surfaces as mycelium with superficial ascomata and suggested that Chevalieropsis might belong to Perisporiopsidaceae (= Parodiopsidaceae). Boonmee et al. (2011) examined the holotype of C. ctenotricha (PC0084492) and accepted Chevalieropsis in Perisporiopsidaceae. Molecular data is lacking. Fresh collections with DNA sequence data are needed to confirm the taxonomic placement of Chevalieropsis.
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