Dictyosporiaceae
Dictyosporiaceae Boonmee & K.D. Hyde.
Index Fungorum number: IF 551574
Saprobic on plant litter and wood, mostly superficial, effused, comprising dark brown, immersed mycelium in host tissues. Sexual morph: Ascomata perithecial, superficial, solitary, subglobose, dark brown, somewhat soft, and collapsing when dry, with an apical ostiole. Peridium membranaceous, dark brown, composed of 2–3 layers of small cells of textura epidermoidea. Hamathecium comprising cylindrical, septate, cellular, pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, cylindrical, pedicellate, apically rounded with an ocular chamber. Ascospores biseriate, hyaline, fusiform, 1-septate, slightly constricted at septum, with or without mucilaginous sheath. Asexual morph: Hyphomycetous. Colonies superficial, sporodochial, punctiform or effuse, dark brown. Conidiophores present or reduced to conidiogenous cell, micronematous, semi-macronematous to macronematous, mononematous or synnematous, unbranched or rarely branched, hyaline to medium brown. Conidiogenous cells holoblastic, integrated, terminal or sometimes intercalary, determinate, cylindrical to doliiform. Conidia acrogenous or sometimes pleurogenous, solitary, dry, cheiroid, complanate or non-complanate, pale brown to dark brown, smooth- or rough-walled; conidial rows unicellular to multiseptate, euseptate or distoseptate, separated like digits or more tightly compacted together, with or without appendages; appendages when present globose, cylindrical, clavate or hair-like, colourless to translucent. Conidial secession rhexolytic or schizolytic. (Boonmee et al. 2016)
Type genus: Dictyosporium Corda, Weitenweber’s Beitr. Nat.: 87 (1836)
Notes: A new family Dictyosporiaceae is hereby introduced to accommodate species with cheiroid, digitate, palmate and/or dictyosporous conidia and their sexual morphs that form a monophyletic clade in the Class Dothideomycetes. The family was first mentioned, but not formally introduced, by Liu et al. (2015) as Dictyosporaceae.
Key to freshwater sexual genera of Dictyosporiaceae (Dong et al. 2020)
Ascomata somewhat soft, collapsing when dry, with hyphomycetous asexual morph Dictyosporium
Ascomata not as above, with coelomycetous asexual morph............................. Pseudocoleophoma
Key to asexual genera of freshwater Dictyosporiaceae species (Dong et al. 2020)
1. Coelomycetous..................................................................................... Pseudocoleophoma
1. Hyphomycetous................................................................................................................. 2
2. Conidiomata synnemata........................................................................... Aquaticheirospora
2. Conidiomata sporodochia................................................................................................... 3
3. Conidia non-cheiroid....................................................................................... Dendryphiella
3. Conidia cheiroid.................................................................................................................. 4
4. Conidiophores form distinct sterile branches................................................... Cheirosporium
4. Conidiophores with no sterile branches................................................................................. 5
5. Conidia with divergent arms................................................................................................. 6
5. Conidia with compacted arms.............................................................................................. 7
6. Conidiophores composed of moniliform hyphae............................................. Digitodesmium
6. Conidiophores not as above.................................................................................... Jalapriya
7. Conidia complanate....................................................................................... Dictyosporium
7. Conidia non-complanate...................................................................................................... 8
8. Conidia with basal hyaline cell..................................................................... Aquadictyospora
8. Conidia not as above.......................................................................................................... 9
9. Conidial arms mostly curved towards tip.................................................... Dictyocheirospora
9. Conidial arms mostly parallel.............................................................................................. 10
10. Conidia elongated subcylindrical.............................................................................. Vikalpa
10. Conidia mostly ellipsoidal................................................................. Pseudodictyosporium
References:
Dong, W., Wang, B., Hyde, K.D., McKenzie, E.H.C., Bhat, D.J et al. (2020) Freshwater Dothideomycetes. Fungal Diversity
Liu JK, Hyde KD, Jones EBG, Ariyawansa HA, Bhat DJ, Boonmee S, Maharachchikumbura S, McKenzie EHC, Phookamsak R, Phukhamsakda C, Shenoy BD, Abdel-Wahab MA, Buyck B, Chen J, Chethana KWT, Singtripop C, Dai DQ, Dai YC, Daranagama DA, Dissanayake AJ, Doliom M, D’ souza MJ, Fan XL, Goonasekara ID, Hirayama K, Hongsanan S, Jayasiri SC, Jayawardena RS, Karunarathna SC, Li WJ, Mapook A, Norphanphoun C, Pang KL, Perera RH, Peršoh D, Pinruan U, Senanayake IC, Somrithipol S, Suetrong S, Tanaka K, Thambugala KM, Tian Q, Tibpromma S, Udayanga D, Wijayawardena NN, Wanasinghe D, Wisitrassameewong K, Abdel-Aziz FA, Adamčík S, Bahkali AH, Boonyuen N, Bulgakov T, Callac P, Chomnunti P, Greiner K, Hashimoto A, Hofstetter V, Kang JC, Lewis D, Li XH, Liu XX, Liu ZY, Matumura M, Mortimer PE, Rambold G, Randrianjohany E, Sato G, Sri-Indrasutdhi V, Tian CM, Verbeken A, von Brackel W, Wang Y, Wen TC, Xu JC, Yan JY, Zhao RL, Camporesi E (2015) Fungal diversity notes 1–110: taxonomic and phylogenetic contributions to fungal species. Fungal Divers 72:1–197
Recent Genus
1Neochlamydotubeufia
Neohelicomyces
Recent Species
Neohelicomyces submersusNeohelicomyces hyalosporus
Neohelicomyces grandisporus