Dematiohelicomyces
Dematiohelicomyces Y.Z. Lu, Boonmee & K.D. Hyde
Index Fungorum number: IF 554824; Facesoffungi number: FoF 04701
Etymology: “Dematio-” referring to dematiaceous conidiophores of this genus, “-helicomyces” referring to its morphogy similar to Helicomyces.
Saprobic on decaying wood. Sexual morph: Undetermined. Asexual morph: Hyphomycetous, helicosporous. Colonies on the substratum superficial, effuse, gregarious, white to light pink. Mycelium mostly immersed, partly superficial, composed of branched, septate hyphae, pale brown, with masses of crowded, glistening conidia. Conidiophores macronematous, mononematous, cylindrical, mostly unbranched, 0–3-septate, pale brown, smooth-walled. Conidiogenous cells holoblastic, mono- to polyblastic, integrated, sympodial, terminal, cylindrical, truncate at apex after conidial secession, pale brown, smooth-walled. Conidia solitary, acrogenous, helicoid, dry, coiled 1½–3¾ times, becoming loosely coiled or uncoiled in water, rounded at tip, multi-septate, guttulate, hyaline, smooth-walled. (Lu et al. 2018)
Type species: Dematiohelicomyces helicosporus (Boonmee, Y.Z. Lu & K.D. Hyde) Y.Z. Lu
Notes: The monotypic genus Dematiohelicomyces was introduced for a known species Chlamydotubeufia helicospora Boonmee et al. based on morphology and phylogeny (Lu et al. 2018). Dematiohelicomyces is similar to Helicomyces Link by short conidiophores and helicoid conidia with a spathulate basal end cell but differs in having brown conidiophores (Lu et al. 2018). Dematiohelicomyces helicosporus is exclusively recorded from freshwater habitats (Hyde et al. 2016; Lu et al. 2018).
List of freshwater Dematiohelicomyces species
Dematiohelicomyces helicosporus (Boonmee, Y.Z. Lu & K.D. Hyde) Y.Z. Lu, Fungal Diversity 92: 159 (2018)
Basionym: Chlamydotubeufia helicospora Boonmee, Y.Z. Lu & K.D. Hyde, Fungal Diversity 80: 123 (2016)
Freshwater distribution: Thailand (Hyde et al. 2016; Lu et al. 2018)
References
Lu YZ, Liu JK (Jack), Hyde KD, Jeewon R, Kang JC, Fan C, Boonmee S, Bhat DJ, Luo ZL, Lin CG, Eungwanichayapant PD (2018) A taxonomic reassessment of Tubeufiales based on multi-locus phylogeny and morphology. Fungal Divers 92:131–344. https://doi.org/10.1007/s13225-018-0411-y
Hyde KD, Hongsanan S, Jeewon R, Bhat DJ, McKenzie EHC, Jones EBG, Phookamsak R, Ariyawansa HA, Boonmee S, Zhao Q, Abdel-Aziz FA, Abdel-Wahab MA, Banmai S, Chomnunti P, Cui BK, Daranagama DA, Das K, Dayarathne MC, de Silva NI, Dissanayake AJ, Doilom M, Ekanayaka AH, Gibertoni TB, Góes-Neto A, Huang SK, Jayasiri SC, Jayawardena RS, Konta S, Lee HB, Li WJ, Lin CG, Liu JK, Lu YZ, Luo ZL, Manawasinghe IS, Manimohan P, Mapook A, Niskanen T, Norphanphoun C, Papizadeh M, Perera RH, Phukhamsakda C, Richter C, André ALCM, Drechsler-Santos ER, Senanayake IC, Tanaka K, Tennakoon TMDS, Thambugala KM, Tian Q, Tibpromma S, Thongbai B, Vizzini A, Wanasinghe DN, Wijayawardene NN, Wu HX, Yang J, Zeng XY, Zhang H, Zhang JF, Bulgakov TS, Camporesi E, Bahkali AH, Amoozegar MA, Araujo-Neta LS, Ammirati JF, Baghela A, Bhatt RP, Bojantchev D, Buyck B, da Silva GA, de Lima CLF, de Oliveira RJV, de Souza CAF, Dai YC, Dima B, Duong TT, Ercole E, Mafalda-Freire F, Ghosh A, Hashimoto A, Kamolhan S, Kang JC, Karunarathna SC, Kirk PM, Kytövuori I, Lantieri A, Liimatainen K, Liu ZY, Liu XZ, Lücking R, Medardi G, Mortimer PE, Nguyen TTT, Promputtha I, Raj KNA, Reck MA, Lumyong S, Shahzadeh-Fazeli SA, Stadler M, Soudi MR, Su HY, Takahashi T, Tangthirasunun N, Uniyal P, Wang Y, Wen TC, Xu JC, Zhang ZK, Zhao YC, Zhou JL, Zhu L (2016) Fungal diversity notes 367–490: taxonomic and phylogenetic contributions to fungal taxa. Fungal Divers 80:1–270. https://doi.org/10.1007/s13225-016-0373-x
Recent Genus
1Neochlamydotubeufia
Neohelicomyces
Recent Species
Neohelicomyces submersusNeohelicomyces hyalosporus
Neohelicomyces grandisporus