Dicephalospora inthanonensis
Dicephalospora inthanonensis K. Phutthacharoen, Chethana and K.D. Hyde. (Figure 6).
Index Fungorum number: IF559758; Facesoffungi number: FOF12543.
Etymology: “inthanonensis” refers to the locality where the fungus was collected.
Holotype: MFLU 22-0050.
Saprobic on dead leaf. Sexual morph: Apothecia 0.3–0.5 diameter mm, when dry arising solitary or gregarious in a small group, scattered on wood, centrally stipitate, superficial, yellow to orange when fresh, become red when dry. The stipe is 0.3–0.7 mm and dark at the base. The receptacle is orange and cupulate. The margins are smooth and orange to dark orange. The disc is slightly convex and orange or red wine. The ectal excipulum is composed of thick-walled, hyaline to light orange, gelatinized yellowish cells of textura globulosa to textura angularis. The medullary excipulum is composed of thin-walled, hyaline to yellowish, gelatinized cells of textura porrecta to textura intricata. The hymenium is hyaline to yellowish and inner mixed with asci and paraphyses. Paraphyses are 2.0–3.0 µm wide (x = 2.5 µm, n = 25) at the terminal cell, filiform, and numerous, and have lengths exceeding the asci; they are unbranched, aseptate, and are swollen, small, and globose at the apex. Asci are 95–115 × 8–11 µm (x = 105 × 9 µm, n = 20), eight-spored, unitunicate, cylindrical, and clavate, with the amyloid (J+) having a rounded apex in Melzer’s reagent. Ascospores are 24–32 × 3–5 µm (x = 27 × 4 µm, n = 15), uniseriate to biseriate, and fusiform, with a non-mucilaginous cap. Asexual morphology: undetermined.
The details of the material examined are as follows: Thailand, Chiang Mai Province, Chom Thong District, Doi Inthanon National Park, Kew Mae Pan nature trail, on a dead leaf, 20 October 2021, Kunthida Phuttacharoen, KMPD3.6 (MFLU 22-0050, holotype); ibid., KMPD3.6a (MFLU 22-0051, isotype); ibid., KMPD3.6b (MFLU 22-0052, isotype); ibid., Ang Ka nature trail, on dead leaf, 18 October 2021, Kunthida Phuttacharoen, AG2.15 (MFLU 22-0053, paratype).
The GenBank accession information is as follows: MFLU 22-0050: LSU-ON604634, ITS-ON606312; MFLU 22-0053: LSU-ON604635, ITS-ON606313
Notes: Our specimens MFLU 22-0050 and MFLU 22-0053 grouped as a sister clade to Dicephalospora shennongjiana HMAS 279698 and Dicephalospora huangshanica clade (Figure 1), with 76% ML bootstrap support and 0.94 Bayesian posterior probabilities. Furthermore, the pairwise homoplasy index (PHI) showed no significant genetic recombination between D. inthanonensis and its sister taxa D. huangshanica (Figure 4).
Figure 6. Dicephalospora inthanonensis (MFLU 22-0050, holotype). (a,b) Dicephalospora species on a leaf; (c,d) cross section of the apothecium; (e) close up of the excipulum; (f) filiform paraphyses and asci; (g) fusiform ascospores; (h) apical part of ascus in Melzer’s reagent; (i) cylindrical asci. Scale bars (a) = 1 mm; (b) = 400 µm; (c) = 200 µm; (d) = 100 µm; (f,i) = 20 µm; (g) = 10 µm; (h) = 5 µm.
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