Montagnula thevetiae Wanas., MycoKeys

Tun, Zaw Lin, Bhunjun, Chitrabhanu S., Maharachchikumbura, Sajeewa S. N., Alotibi, Fatimah & Hyde, Kevin D., 2024, Morpho-molecular characterization of two Pleosporales species, Montagnula thevetiae and Thyridaria thailandica sp. nov. in northern Thailand, Phytotaxa 676 (2), pp. 139-154 : 145-147

publication ID	https://doi.org/10.11646/phytotaxa.676.2.3
persistent identifier	https://treatment.plazi.org/id/FC7C9808-0072-8577-FF36-C6301502FF67
treatment provided by	Felipe
scientific name	Montagnula thevetiae Wanas., MycoKeys
status

Treatment

Montagnula thevetiae Wanas., MycoKeys 101: 215 (2024)

( FIG 3 View FIGURE 3 )

Index Fungorum number: IF 850096, Facesoffungi number: FoF 16954

Saprobic on dead stems of unidentified host. Sexual morph: Ascomata 290–320 µm high × 248–267 µm diam (x̄ = 310 × 260 μm, n = 20), immersed, solitary, scattered, globose, coriaceous, yellowish brown to brown, ostiolate. Ostiole central, cylindrical, papillate, protruding from substrate. Peridium 28–48 µm wide, comprising 2–3 layers of thinwalled, yellowish brown to light brown cells of textura angularis. Hamathecium comprises 2–3 µm wide, cylindrical to filiform, septate, branching pseudoparaphyses. Asci 95–173 ×19–32 µm (x̄ = 132 × 25 μm, n = 20), 8-spored, bitunicate, cylindric-clavate, slightly curved, with a short pedicel. Ascospores 32–44 µm long × 7–16 µm wide (x̄ = 38 × 11 μm, n = 20), broadly fusiform to ellipsoid, widest at the center, yellow to white when immature and reddish-brown when mature, hyaline at appendage at both ends, straight to slightly curved, 1-septate, with 2 large guttules at the center when immature, smooth-walled. Asexual morph: Undetermined.

Material examined:— Thailand, Chiang Mai Province, in the forests around the Mushroom Research Center (19° 07.200’ N, 98° 44.044’ E), unidentified dead branch, 14 November 2022, ZL Tun, MRC85, (MFLU 24-0002).

Distribution:— Thailand.

GenBank accession numbers:— ITS = PQ512825, LSU = PQ529133 and tef- 1α = PQ594789.

Notes:— Based on the phylogenetic analysis, our strain (MFLU 24-0002) clustered with the strains of M. thevetiae (HKAS 126964, HKAS 126963) ( Fig 1 View FIGURE 1 ). and it is morphologically similar to M. thevetiae ( Wanasinghe et al. 2024) . The ITS and LSU and tef -1α regions are identical. Our strain (MFLU 24-0002) lacks rpb 2 and SSU sequences for the base pair comparisons. Our new collection has overlapping characteristics compared to M. thevetiae isolates, including immersed, globose, subglobose and ellipsoidal ascospores that are straight to curved, brown, and 1-septate. Thus, we identify our isolate is M. thevetiae . We introduce our new isolate as a geographical record.

Thyridariaceae Q. Tian & K.D. Hyde