Pleurotheciales » Pleurotheciaceae » Neomonodictys

Neomonodictys muriformis

Neomonodictys muriformis Y.Z. Lu, C.G. Lin & K.D. Hyde, in Hyde et al., Fungal Diversity 100: 207 (2020)

Index Fungorum number: IF556731         Facesofungi number: FoF 06819

Etymology: Name refects its muriform conidia.

Holotype: MFLU 17-1178


Saprobic on decaying wood in a freshwater stream. Sexual morph: Undetermined. Asexual morph: Hyphomycetous, dictyosporous. Colonies on natural substratum superfcial, scattered, black, glistening. Mycelium immersed in  the substrate, composed of septate, branched, smooth, thinwalled, hyaline to pale brown, 2–3 μm wide hyphae. Conidiophores lacking. Conidiogenous cells holoblastic, monoblastic, integrated, terminal, determinate, brown. Conidia 20–30 × 15–25 μm ( x̄ =22 × 20 μm, n=20), acrogenous, solitary, subglobose to globose, muriform, smooth-walled,  pale brown when immature, darkened to black when mature, sometimes with one basal cell paler than the others.


Culture characteristics: Conidia germinating on WA and germ tubes produced from conidia within 36 h. Colonies growing on MEA, circular, with fat surface, edge entire, reaching 19 mm in 6 weeks at 28 °C, pale brown to brown in MEA medium. Mycelium superfcial and partially immersed, branched, septate, hyaline to pale brown, smooth.


Material examined: THAILAND, Krabi Province, Plai Praya, Khao To, Ban Bang Thao Mae, on submerged decaying wood in a freshwater stream, 17 December 2015, S. Boonmee, BTM05-4 (MFLU 17-1178, holotype), ex-type living culture, MFLUCC 16-1136.


GenBank Accession No: ITS=MN644509, LSU=MN644485, TEF1-α=MN646856.


Notes: The monophyletic asexual genus Neomonodictys is established for a fungus collected from freshwater habitat from Thailand that is morphologically similar to members of Monodictys S. Hughes, but phylogenetically distinct. Monodictys is characterised by monoblastic, hyaline to brown conidiogenous cells, solitary, dictyospores, subglobose, pyriform or clavate conidia (Ellis 1971; Seifert et al. 2011). Conidiophores of Monodictys are often reduced to conidiogenous cells (Ellis 1971; Seifert et al. 2011). Monodictys was placed in Dothideomycetes (Day et al. 2006; Seifert et al. 2011; Wijayawardene et al. 2017a, 2018a). Phylogenetic inference in this study showed that Neomonodictys muriformis formed a highly supported clade within Pleurotheciaceae (Pleurotheciales, Sordariomycetes), which is distant to Monodictys. Therefore, the new generic name, Neomonodictys, is introduced.

Figure X. Neomonodictys muriformis (MFLU 17-1178, holotype). a Colonies on decaying woody substrate. b–i Conidia on decaying woody substrate. j Germinating conidium. k, l Colony on MEA from above and below. m–q Conidia on living culture. Scale bars: b–j, m–q=20 µm


Reference: Hyde KD, Dong Y, Phookamsak R, Jeewon R, Bhat DJ, Jones EB, Liu NG, Abeywickrama PD, Mapook A, Wei D, Perera RH. Fungal diversity notes 1151–1276: taxonomic and phylogenetic contributions on genera and species of fungal taxa.




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