Tirisporellales » Tirisporellaceae » Thailandiomyces

Thailandiomyces bisetulosus

Thailandiomyces bisetulosus Pinruan et al.

Index Fungorum number: IF511589

Asexual morph: Ascomata 275–325 µm diameter, partially immersed to superficial, globose, black, coriaceous, ostiolate, scattered to gregarious. Neck up to 1 mm long, 100 µm diam., periphyses with short hyaline cells, central, cylindrical, black. Peridium up to 45 µm thick, composed of one stratum of compressed cells, of textura angularis, black to the outside, brown inwardly. Paraphyses present but deliquescent, irregular in width, up to 5–6.5 µm wide, rarely septate, tapering towards apices, embedded in a mucilaginous matrix. Asci 65–75 × 6–7.5 µm (x̄ = 67.5 × 6.8 µm, n = 20), 8-spored, cylindrical to clavate, unitunicate, apedicellate, free-floating, apically truncate, with a Jsubapical ring, 2 × 2 µm. Ascospores 20–25 × 3.5–5 µm (x̄ = 22.9 × 4 µm, n = 30), overlapping 2-seriate, fusoid, straight or curved, hyaline, 1-septate, smoothwalled, with 4-5 large guttules, with bipolar spine-like appendages, usually bent laterally, 5–7.5 µm long, 1–1.5 µm diam. Asexual morph: Craspedodidymum licualae. Colonies on natural substratum effuse, black. Mycelium superficial. Conidiophores macronematous, mononemataus, erect, brown, paler toward the apex, straight or flexuous, smooth, but rough at the apex. Conidiogenous cells integrated, terminal, 20–27.5 × 6.2–7.5 µm, enteroblastic and monophialidic. Conidia 13.7–17.5 × 7.5–10 µm, obovoid or ellipsoid, broadly rounded at both ends, brown, papillate at the basal end, O-septate.

Specimen examined: THAILAND, on submerged trunk of Licuala longicalycata

 

Fig 1. Thailandiomyces bisetulosus (Material examined: THAILAND, Narathiwat, Sirindhorn Peat Swamp Forest, on submerged trunk of Licuala longicalycata, 12 May 2001, U. Pinruan, BBH Wah 110, holotype). a. Herbarium material. b, c. Long necked ascomata. d. Vertical section through ascoma. e. Peridium. f. Periphysate ostiolar region. G. Paraphyses. h, i. Asci. j, k. Ascospores. Scale bars: c = 500 μm, d, h, i = 50 μm, e-g = 20 μm, j, k = 10 μm. (Photo grabbed from Hyde et al. 2020)

Fig 2. Craspedodidymum licualae (Asexual morph). 14-18. Light micrographs of anamorph in culture. 14-15. Single ascospore germination (arrowed). 16-18. Conidiophores and conidia. Bars: 14-18 = 10 µm.

References:

Pinruan U, Sakayaroj J, Hyde KD, Jones EBG (2008) Thailandiomyces bisetulosus gen. et sp. nov. (Diaporthales, Sordariomycetidae, Sordariomycetes) and its anamorph Craspedodidymum, is described based on nuclear SSU and LSU rDNA sequences. Fungal Divers 29:89–98

 

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