Kirschsteiniothelia xishuangbannaensis R.F. Xu & Tibpromma

de Farias, Antonio Roberto Gomes, Afshari, Naghmeh, Silva, Veenavee S. Hittanadurage, Louangphan, Johnny, Karimi, Omid & Boonmee, Saranyaphat, 2024, Three novel species and new records of Kirschsteiniothelia (Kirschsteiniotheliales) from northern Thailand, MycoKeys 101, pp. 347-370 : 347

Kirschsteiniothelia xishuangbannaensis R.F. Xu & Tibpromma

Fig. 7

Description.

Saprobic on Microcos paniculata ( Malvaceae ) woody litter in terrestrial habitats. Sexual morph: Not observed. Asexual morph: Hyphomycetes . Colonies effuse on the substrate, hairy, solitary or scattered, dark brown. Conidiophores 135-178 × 7.7-11 μm (x̄ = 151 × 9 μm, n = 10), macronematous, straight to curved, solitary, brown, slightly larger at base, narrowing towards apex, septate. Conidiogenous cells 14.4-27.4 × 7.8-11 μm (x̄ = 22 × 10 μm, n = 10), holoblastic, monoblastic, integrated, smooth, terminal, determinate, cylindrical or lageniform, brown. Conidia 70-141 × 14.5-19 μm (x̄ = 100 × 17 μm, n = 20), solitary, acrogenous, obclavate, rostrate, straight or slightly curved, truncate at the base, olivaceous green to brown, subhyaline at the apex, 5-10-septate, large guttulate.

Culture characteristics.

Conidia germinating on PDA within 24 hours reaching up to 2 cm diam. after one week at room temperature. Germ tubes generated from both end cells. Colony on PDA, dense, circular, flat or effuse, velvety, from front, brown at the centre and dark brown at edge, from reverse, black to pale brown radiating.

Material examined.

Thailand, Chiang Rai, Mae Fa Luang, Doi Tung , on dead wood of Microcos paniculata , 6 June 2022, N. Afshari 3C2T1R1, living culture MFLUCC 23-0273. On dead wood of Dipterocarpus alatus , 27 September 2022, N. Afshari 2C3T1R3c (MFLU 23-0418), living culture MFLUCC 23-0274 .

Known distribution.

China ( Xu et al. 2023), Thailand (this study).

Known hosts.

Hevea brasiliensis ( Xu et al. 2023), Microcos paniculata and Dalbergia cana (this study).

Figures

Figure 7. Kirschsteiniothelia xishuangbannaensis (MFLUCC 23 - 0273, new record) a, b colonies on wood c, d conidiophores and conidiogenous cells e conidiophore with conidium f-o conidia p germinated conidium q, r culture on PDA (front and reverse). Scale bars: 200 μm (a); 100 μm (b); 50 μm (c, d, p); 30 μm (e); 20 μm (f-o).