Cercosporiopsis
Cercosporiopsis Miura, Flora of Manchuria and East Mongolia, III Cryptogams, Fungi (Industr. Contr. S. Manch. Rly 27): 527 (1928).
Index Fungorum number: IF 7549; Facesoffungi number: FoF 08592, 3 morphological species (Species Fungorum 2022), no molecular data available.
On living leaves of Mentha canadensis. Sexual morph: Unknown. Asexual morph: Hypophyllous, appearing at first on small, indefinitely-limited, dark brown spots, which finally become orbicular, mostly concave below and more or less confluent, so that the leaf appears more or less blackened and dead. Hyphae nearly straight, pale brown, mostly continuous, with a few shoulder-like blotches above, forming tufts arising from a subspherical, tubercular base. Conidia obclavate, brown, nucleate, becoming 3–5 septate. Many of the conidia are much shorter, obovate or oblong-elliptical, 1–3 septate, resembling the conidia of a Cladosporium (adapted from description of Cercospora menispermi in Ellis and Everhart 1888).
Type species: Cercosporiopsis menispermi (Ellis & Holw.) Miura
Notes: Cercosporiopsis was introduced by Miura (1928) with C. menispermi as type species. Cercosporiopsis is characterised by hypophyllous, dark brown spots, obclavate, brown, nucleate conidia becoming 3–5 septate. The placement of Cercosporiopsis in Mycosphaerellaceae is doubtful. Fresh specimen with DNA sequence data is needed to confirm the taxonomic placement of Cercosporiopsis.
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