Mycosphaerellales » Mycosphaerellaceae


Cercodeuterospora Curzi, Boll. R. Staz. Patalog. Veget. Roma 12: 3 (1932).

Index Fungorum number: IF 7542 ; Facesoffungi number: FoF 08588, 1 morphological species (Species Fungorum 2022), no molecular data available.

Associated with leaf spot. Colonies effuse, greyish olivaceous to olivaceous brown. Stroma absent or poorly developed. Mycelium pale to moderately deep olivaceous, septate, branched, smooth, stromata absent or small; superficial hyphae arising from internal hyphae or stromatic hyphal aggregations, usually emerging through stomata. Sexual morph: Unknown. Asexual morph: Conidiophores macronematous, mononematous, solitary, arising from superficial hyphae or in small to medium fascicles, erect, tangled or forming loose ropes resembling synnemata, straight to flexuous, simple or branched, subcylindrical to geniculate-sinuous, thin-walled, continuous to septate, smooth, sub hyaline to pigmented. Conidiogenous cells integrated, terminal, intercalary or pleurogenous, straight to geniculate-sinuous, polyblastic, sympodial, with conidiogenous loci thickened, darkened and often protuberant. Conidia solitary to catenate, sometimes in branched chains, ellipsoid-ovoid, subcylindrical-fusiform, obclavate, straight or curved, aseptate or multiseptate (euseptate), sub hyaline to pigmented, smooth to slightly verruculose, ends obtuse, rounded, truncate or pointed; hila thickened and darkened; conidial secession schizolytic (adapted from Videira et al. 2017).


Type species: Cercodeuterospora trichophila Curzi


Notes: Cercodeuterospora is characterised by pale to moderately deep olivaceous mycelium, micronematous conidiophores, intercalary or pleurogenous conidiogenous cells, and aseptate or multiseptate obclavate conidia. Cercodeuterospora is considered as a synonym of Mycovellosiella cajani based on morphology. Deighton (1974) proposed the combination Mycovellosiella cajani var. trichophila for Cercodeuterospora trichophila based on a specimen from Kenya (IMI 68281) which he found very similar to the sample illustrated and described by Curzi (1932). The type specimen by Curzi (1932) cannot be located and DNA sequence data is lacking. The placement of Cercodeuterospora in Mycosphaerellaceae is doubtful.


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