Pleosporales » Dictyosporiaceae » Digitodesmium

Digitodesmium chiangmaiense

Digitodesmium chiangmaiense Q.J. Shang & K.D. Hyde, in Hyde et al., Fungal Diversity: 10.1007/s13225-019-00429-2, [27] (2019)

Indexfungroum number: IF556220           Facesoffungi number: FoF05098

 

Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies punctiform, sporodochial, scattered, dark brown to black, glistening. Conidiophores micronematous, hyaline to pale brown, unbranched, thin-walled, smooth. Conidiogenous cells monoblastic, integrated, terminal, determinate, hyaline to pale brown, smooth. Conidia acrogenous, solitary, cheiroid, smooth-walled, complanate, brown to dark brown, consisting of three arms closely compact with side arms higher than middle arms, (24–)33–42(–44) × (13–)15–18(–21) µm (x̅ = 38 × 17 µm, n = 45), 5–7-euseptate in each arm,  without appendages attached at the two outer arms, arms (20–)27–37(–38) × (4–)4–7(–8) µm (x̅ = 32 × 5 µm, n = 30), not discrete, unbranched, cylindrical.

 

Culture characteristics: Conidia germinating on PDA within 24 h. Germ tubes produced from the basal cell. Colonies on PDA reaching 3–5 mm diam. after 7 days at room temperature, colonies circular, with fluffy, dense, white mycelium in the middle and sparse mycelium in the outer ring on the surface with irregular brown margin; in reverse, brown in the middle and pale yellow to brown at the margin.

 

Habitat: Saprobicon on dead wood

 

Known distribution: Thailand

 

Material examined: THAILAND, Chiang Mai Province, Mae Taeng District, Mushroom Research Center, on dead wood, 27 January 2017, Qiuju Shang, M7P4-17 (KUN-HKAS 102163, holotype), ex-type living culture (MFLUCC, ICMP).

 

GenBank numbers: LSU: MK571766, SSU: MK571775.

 

Notes: Based on analysis of combined ITS and LSU sequence data, Digitodesmium chiangmaiense (M7P4-17) groups with D. bambusicola (CBS 110279) with moderate support (57% ML, 52% MP and 0.92 BYPP). Digitodesmium chiangmaiense differs from D. bambusicola in lacking appendages on the outer of the arms and having longer conidia (Table 2). In addition, D. chiangmaiense differs from other Digitodesmium species in the dimension and number of arms.

 

Figure 1. Digitodesmium chiangmaiense (KUN-HKAS 102163, holotype). a, b Colonies on submerged wood. c Squash mount of a sporodochium. d–g Conidia with conidiophores. h Conidium. i Germinated conidia. j, k Culture characteristics on PDA (j from  above view, k from below view) Scale bars: c = 20 µm, d–i = 10 µm.

 

Reference: Hyde KD, Tennakoon DS, Jeewon R, et al. (2019) Fungal diversity notes 1036–1150: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Diversity 96: 1–242.

 

Recent Genus

Epicoccum
Amphisphaeria
Paraeutypella

Recent Species

Roussoella chiangraiensis
Anastomitrabeculia chiangraiensis
Epicoccum diplopterygii