Dothideomycetes families incertae sedis » Dothideomycetes genera incertae sedis » Monodictys

Monodictys melanocephaloides

Monodictys melanocephaloides Goh & K.D. Hyde

Index Fungorum number: IF 459997

Etymology: melanocephaloides, referring to the dark conidia of this taxon which superficially resemble those of Melanocephala species

Holotype: HKU (M) 3334

 

Sexual morhp: Udetermined. Asexual morph: Colonies on natural substratum sporodochioid, farinose, black. Mycelium partly superficial and partly immersed, comprising pale to medium brown, 1.5–2.5 µm wide, smooth or verruculose, septate, branched hyphae. Setae and hyphopodia absent. Stromata not developed. Conidiophores micronematous. Conidial secession rhexolytic. Conidia borne on undifferentiated hyphae which are usually aggregated into sporodochioid clumps, doliiform to broadly ellipsoidal or obovate, smooth-walled, (22–)28–35(–37) × (12–)15–28 µm, dark brown to black, dictyoseptate, septa often obscured by the dark pigmentation, the base mostly comprising three cells which are subhyaline to very pale brown with visible septa.

 

Material examined: CHINA, Hong Kong, Plover Cove Reservoir, on submerged wood, 15 Nov. 1996,

Michelle K.M. Wong and K.D. Hyde, PC35 (HKU(M) 3334)

 

Freshwater distribution: China (Goh and Hyde 1999), Thailand (Hu et al. 2010)

 

Figs 42-49 Monodictys melanocephaloides (from holotype). 42 Portion of colony on natural substratum. 43 Squash-mount of a sporodochioid clump showing conidia. 44 Two conidia arising from conidiogenous hyphae. 45 Conidiogenous hyphae bearing conidiogenous cells (arrowed). 46–49 Conidia. Scale bars: 42 = 20 µm, 43–49 = 10 µm. (Goh and Hyde 1999)

Fig. 50. Monodictys melanocephaloides (from holotype). Diagrammatic representation of conidiogenous hyphae and muriform conidia. Scale bar = 20 µm. (Goh and Hyde 1999)

 

References

Goh TK, Hyde KD (1999) Fungi on submerged wood and bamboo in the Plover Cove Reservoir, Hong Kong. Fungal Divers 3:57–85

Hu DM, Cai L, Chen H, Bahkali AH, Hyde KD (2010) Fungal diversity on submerged wood in a tropical stream and an artificial lake. Biodivers Conserv 19:3799–3808. https://doi.org/10.1007/s10531-010-9927-5

 

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