Pleosporales » Didymosphaeriaceae » Kalmusia

Kalmusia erioi

Kalmusia erioi Samarak., Thambugala & K.D. Hyde, in Hyde et al., Fungal Diversity 100: 47 (2020)

Index Fungorum number: IF556802,        Facesoffungi number: FoF 06462


Sexual morph: Ascomata 140–170 μm high, 145–240 μm diam. (x̄ = 157 × 182 μm, n = 10), immersed, slightly erumpent through the host tissue, scattered or gregarious, dark brown to black, uni- to bi-loculate, globose to subglobose, with a flattened base. Ostiole blackish-brown, smooth, ostiolar canal filled with hyaline cells. Peridium 10–18 μm wide, 4–5 layers, comprising 4.4–13.4 × 2–4.5 μm (x̄ = 8.5 × 3.2 μm, n = 20), brown to lightly pigmented, slightly flattened cells of textura angularis. Hamathecium comprising numerous, 2–3.5 μm wide (x̄ = 2.7 μm, n = 20), cellular, branched, septate pseudoparaphyses. Asci 76–113 μm × 13–18 μm (x̄ = 89.7 × 15 μm, n = 20), 8-spored, bitunicate fissitunicate, clavate, short-pedicellate, thick-walled at the apex, with an ocular chamber. Ascospores 15.5–20 × 7.7–8.5 μm (x̄ = 17.6 × 7.5 μm, n = 30), overlapping 1–2-seriate, mostly ellipsoidal, muriform, 3-transversely septate, with 1–2 vertical septa, deeply constricted at the middle septum, slightly constricted at the remaining septa, initially hyaline to pale yellow, becoming brown at maturity, rounded and pointed at ends remain in light brown, guttulate and smooth-walled. Asexual morph: Undetermined.


Culture characteristics: -


Material examined: THAILAND, Chiang Rai Province, Mae Fah Luang University, on dead branch of a dicotyledonous tree, 9 July 2017, M.C. Samarakoon, SAMC075 (MFLU 18-0832, holotype); ibid., KUN-HKAS 102374 (isotype).


GenBank Accession No: ITS = MN473058, LSU: MN473052, SSU: MN473046, TEF1-α: MN481599,

TUB2: MN481603.


Notes: The morphological characters of Kalmusia erioi fit into the generic concept of Kalmusia in having immersed to erumpent ascomata, filiform, delicate, septate pseudoparaphyses, bitunicate, clavate asci with narrowly ovoid to clavate, pale brown, 3-septate ascospores. Ascospores of Kalmusia erioi are characterised with 1–2 vertical septa, deeply constricted at the middle septum and rounded and pointed at ends remaining in light brown which are different from other Kalmusia species. The combined LSU, SSU, ITS and TEF1-α phylogenetic analyses show that our strain (MFLU 18-0832) clusters as basal to Kalmusia clade (97% ML, 1.00 BYPP; Fig. 34). BLASTn search of LSU is similar to Kalmusia variispora (Verkley, Göker & Stielow) Ariyaw. & K.D. Hyde strain M5 (MK138781, 99.5% similarity). Based on clear morphological differences and available molecular data, here we introduce Kalmusia erioi as a new species following guidelines by Jeewon and Hyde (2016). This is the first Kalmusia species reported from Thailand.


Figure X. Kalmusia erioi (MFLU 18-0832, holotype). a, b Appearance of ascomata on the substrate. c Peridium. d Vertical section of ascoma. e Pseudoparaphyses. f–i Asci. j–o Ascospores. Scale bars: a = 1000 μm, b = 200 μm, c, d = 50 μm, f–i = 20 μm, j–o = 10 μm, e = 5 μm

Reference: Hyde KD, Dong Y, Phookamsak R, Jeewon R et al. (2020) Fungal diversity notes 1151–1276: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Diversity (2020) 100:5–277.


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Supported by 

Thailand Science Research and Innovation (TSRI),

project entitled:

"The future of specialist fungi in a changing climate: baseline data for generalist and specialist fungi associated with ants Rhododendron species and Dracaena species"

(Grant No. DBG6080013)

"Impact of climate change on fungal diversity and biogeography in the Greater Mekong Sub-region"

(Grant No. RDG6130001)


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    1 Center of Excellence in Fungal Research
  • Mae Fah Luang University Chiang Rai
    57100 Thailand
  • 2 Kunming Institute of Botany
  • Chinese Academy of Sciences,
  • Honghe County 654400, Yunnan, China

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