Pleosporales » Pseudoberkleasmiaceae » Pseudoberkleasmium

Pseudoberkleasmium chiangmaiense

Pseudoberkleasmium chiangmaiense Y.Z. Lu & K.D. Hyde, in Hyde et al., Fungal Diversity: 10.1007/s13225-019-00429-2, [62] (2019)

Index Fungorum number: IF555595         Facesoffungi number: FoF05310



Sexual morph: Undetermined. Asexual morph: Hyphomycetous, dictyosporous. Colonies on natural substratum sporodochia, superficial, compact, scattered, irregular, black, glistening. Mycelium immersed in the substrate, composed of septate, branched, smooth, thin-walled, hyaline to pale brown, 2 μm wide hyphae. Conidiophores micronematous, mononematous, reduced, hyaline, smooth-walled. Conidiogenous cells 12–18 × 12–18 μm (x̄ = 15 × 14 μm, n = 20), holoblastic, monoblastic, integrated, terminal, determinate, subglobose, with guttulate, hyaline. Conidia 30–35 × 15–20 μm (x̄ = 33 × 18 μm, n = 20), acrogenous, solitary, broadly ellipsoidal to obovoid, flattened, muriform, guttulate, smooth-walled, brown, usually with conidiogenous cell attached.


Culture characteristics: Conidia germinating on water agar and germ tubes produced from conidia within 12 h. Colonies growing on PDA, circular, with flat surface, edge entire, reaching 28 mm in 3 weeks at 28 °C, white to pale brown in PDA medium. Mycelium superficial and partially immersed, branched, septate, hyaline to pale brown, smooth.



Material examined: Thailand, Chiang Mai Province, Mae Taeng District, Mushroom Research Center, on decaying wood, 25 January 2017, Yong-Zhong Lu, MRC 23 (MFLU 17–1118, holotype), ex-type living culture (MFLUCC 17–1809).


GenBank Accession No: ITS: MK131259, LSU: MK131260, TEF1: MK131261.


Notes: Pseudoberkleasmium chiangmaiense is similar to P. pandanicola in having hyaline subglobose conidiogenous cells and acrogenous, broadly ellipsoidal to obovoid, muriform, brown and guttulate conidia, but differs by its larger conidiogenous cells (12–18 × 12–18 μm vs 5–11 × 9–12 μm). Phylogenetically, Pseudoberkleasmium chiangmaiense shares a sister relationship to P. pandanicola with good bootstrap support (100% ML/1.00 BYPP); the phylogeny also indicates that they are distinct species.


Figure X. Pseudoberkleasmium chiangmaiense (MFLU 17-1118, holotype). a Colonies on substrate. b–j Conidia. k Germinating conidium. l, m Colony on PDA (l from above view, m from below view). Scale bars: a = 200 μm, b–k = 20 μm, l, m = 20 mm.


Reference: Hyde KD, Tennakoon DS, Jeewon R, Bhat DJ, et al. (2019) Fungal diversity notes 1036–1150: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Diversity 96(1): 1242.






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