Pleosporales » Dictyosporiaceae » Cheirosporium

Cheirosporium triseriale

Cheirosporium triseriale L. Cai & K.D. Hyde

Index Fungorum number: IF 506551

 

Saprobic on submerged woody bamboo culms. Sexual morph: Undetermined. Asexual morph: Sporodochia on the natural substratum 150–300 μm diam, scattered, punctiform, brown, dark brown or black. Mycelium immersed or partly superficial, consisting of branched, septate, smooth, thin-walled, subhyaline to light brown hyphae. Stroma none. Setae and hyphopodia absent. Conidiophores 50–120 × 4–6 μm, semi-macronematous to macronematous, mononematous, hyaline to subhyaline, smooth-walled, septate, flexuous, irregularly branched, branches sterile or fertile; sterile branches with an elongate, relatively enlarged, obclavate, apical cell, 12–18 μm long, 4.5–6 μm wide. Conidiogenous cells monoblastic, terminal, determinate, hyaline to subhyaline, doliiform or broad-cylindrical, not proliferating. Conidia 15–25 × 11–15 μm (x̄ = 19 × 12 μm, n = 30), acrogenous, holoblastic, solitary, dry, olivaceous to brown, cheiroid, mostly flattened in one plane, smooth-walled, truncate at the base, with three laterally appressed, 0–1-septate, cylindrical arms, arising from a common basal cell. Conidial secession rhexolytic.

 

Specimen examined: CHINA

 

References:

Cai L, Guo XY, Hyde KD (2008) Morphological and molecular characterisation of a new anamorphic genus Cheirosporium, from freshwater in China. Persoonia 20:53–58    

Fig 1. Cheirosporium triseriale. a. Sporodochial conidiomata on the host surface, b. squash mount of the conidiophores and conidia, c, d. conidiophores bearing conidia (note numerous sterile apices of the conidiophores), e, f. individual conidiophores. Note the sterile branches; g–j. conidia. Scale bars: a = 200 μm, b = 40 μm, c–j = 20 μm. (Photo grabbed from Cai et al. 2008)

 

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