Pleosporales » Dictyosporiaceae » Dictyosporium

Dictyosporium tetrasporum

Dictyosporium tetrasporum L. Cai & K.D. Hyde


Etymology: tetrasporum, referring to the four rows of cells in conidia.


Sexual morph: Undetermined. Asexual morph: Sporodochia on natural substratum punctiform, scattered, black, granular, 350–700 μm in diameter. Conidiophores micronematous, mononematous, thin-walled, septate, branched, pale brown, short, some persistent at conidial maturity. Conidiogenous cells cylindrical, determinate, 4–5 μm wide. Conidial secession rhexolytic. Conidia 23.5–40 × 16–21.5 μm (= 32.5 × 18.5 μm, n = 25), complanate, one-celled thick, cheiroid, smooth-walled, euseptate, medium brown, becoming dark brown with maturity, consisting of 12–27 cells arranged in (3–)4 rows, slightly constricted at the septa, the outer rows are usually shorter, appendage absent. (Descriptions from Cai and Hyde 2007)


Material examined: CHINA, Yunnan, Xishuangbanna, on submerged wood, Jan. 26, 2003, L. Cai, CAI-1F10 (Holotype: HKU(M) 10857). No culture obtained despite several attempts.


Freshwater distribution: Yunnan, China (Cai and Hyde 2007)



Cai L, Hyde KD (2007) Anamorphic fungi from freshwater habitats in China: Dictyosporium tetrasporum and Exserticlava yunnanensis spp. nov., and two new records for Pseudofuscophialis lignicola and Pseudobotrytis terrestris. Mycoscience 48:290–296