Pleosporales » Pseudocoleodictyosporaceae » Pseudocoleodictyospora

Pseudocoleodictyospora thailandica

Pseudocoleodictyospora thailandica Doilom, Bhat & K.D. Hyde, in Doilom et al., Fungal Diversity: 10.1007/s13225-016-0368-7, [30] (2016)

Index Fungorum number: IF551970            Facesoffungi number: FoF01860                                          


Sexual morph: Undetermined. Asexual morph: Colonies on natural substrate, punctiform, sporodochial, superficial, gregarious, scattered, black. Hyphae pale brown to brown, septate, slightly constricted at the septa. Conidiophores up to 7 μm long, 1.5–2.5 μm wide, micronematous, erect to slightly curved, septate, constricted at the septa, arising from hyphae. Conidiogenous cells blastic, integrated, terminal, determinate. Conidia (18–)38–40(−46) × (14–)22–24(−35) μm (x̄ = 37×22μm, n = 50), dictyosporous, bulbil-like, muriform, initially subglobose, becoming ellipsoidal to irregular and pale brown when immature, becoming brown to dark brown, very variable in size and shape.


Culture characteristics: Conidia germinating on PDA within 24 h. Germ tubes produced around conidia. Colonies on MEA reaching 12–16 mm diam. after 7 days in the dark at 25 °C (x̄ = 14.2mm, n =5), circular, edge entire, raised, fluffy, dense, convex or dome-shaped with papillate surface, to superficial at the center, flat or effuse at the edge, greyish brown (7F3) from above, brownish grey (7F2) from below.


Habitat: Known to inhabit bark of living T. grandis.


Known distribution: Thailand.


Material examined: Thailand, Chiang Rai Province, Muang District, Mae Khon Subdistrict, bark of living T. grandis, 8 September 2012, M. Doilom, (MFLU 15– 3533, holotype), ex-type living culture MFLUCC 12– 0565, MKT 081, ICMP.


GenBank Accession No: ITS: KU712441, LSU: KU764701, RPB2: KU712494, SSU: KU712472.


Notes: The conidia of Ps. thailandica are shorter and narrower than Ps. tectonae and Ps. sukhothaiensis. The polymorphic nucleotide sequence data of ITS and RPB2 also support the morphological differences between Ps.thailandica and both Ps. tectonae and Ps. sukhothaiensis.


Figure X. Pseudocoleodictyospora thailandica (MFLU 15–3533, holotype). a Conidia on host surface. b–d Conidia with hyphae. e, f Conidia and conidiophores. g, h Conidia. i Colony on MEA after 7 days (above and below views). j Colony on PDA after 7 days (above and below views). Notes: b, c Stained in lactophenol cotton blue. Scale bars: a = 100μm, b–f, h = 30μm, g = 20μm.


Reference: Doilom M, Dissanayake AJ, Wanasinghe DN, Boonmee S,et al. (2016) Microfungi on Tectona grandis (teak) in northern Thailand. Fungal Diversity 82:107–182.



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

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