Mycosphaerellales » Mycosphaerellaceae

Ramulispora

Ramulispora Miura, Koshurei Agric. Exp. Sta. S. Manchur. Railway Co. Report 11: 43 (1920).

Index Fungorum number: IF 9692; Facesoffungi number: FoF 08558, 12 morphological species (Species Fungorum 2022), 3 species with molecular data.

Graminicolous, causing leaf spots, necrosis, foot-rot, and seedling blight. Mycelium hyaline to faintly pigmented, smooth, septate, branched; stromata absent to well-developed, substomatal to intra-epidermal, hyaline to pigmented. Sexual morph: Unknown. Asexual morph: Conidiophores semi-macronematous or macronematous, mononematous, solitary or fasciculate, arising from inner hyphae or stromata, erumpent through the cuticle or emerging through stomata, simple, rarely branched, continuous or sparsely septate, often reduced to conidiogenous cell, straight, subcylindrical to geniculate-sinuous, smooth, hyaline or subhyaline, rarely faintly pigmented. Conidiogenous cells directly arising from hyphae or stromata or integrated, terminal, subcylindrical to geniculate, monoblastic to polyblastic, sympodial, rarely percurrent, with inconspicuous, unthickened, hyaline conidiogenous loci. Conidia solitary, scolecosporous, acicular, subcylindrical, filiform, narrowly obclavate, sometimes with lateral branchlets (microcyclic conidiation), continuous or septate (branchlets mainly produced under humid conditions and in culture, sometimes developing into secondary conidia which are detached), hyaline, euseptate, multi-septate, smooth, apex blunt to acute, base rounded to truncate, hilum unthickened, hyaline, conidial secession schizolytic (adapted from Videira et al. 2017).

 Type species: Ramulispora andropogonis Miura

Notes: Ramulispora andropogonis has been synonymized with R. sorghi (current name: Gloeocercospora sorghi). Ramulispora is characterised by forming sporodochia with hyaline, transversely euseptate, scolecosporous conidia. Ramulispora accommodates taxa occurring on gramineous hosts. Ramulispora is a distinct and well-supported genus in Mycosphaerellaceae. Molecular markers available for Ramulispora includes ITS, LSU, SSU, Calmodulin, Histone, RPB2 and TEF-1.

 

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