Pleosporales » Roussoellaceae

Neoroussoella

Neoroussoella J.K. Liu, Phook. & K.D. Hyde

Index Fungorum number: IF 550668

 

Saprobic on decaying bamboo culms, submerged wood or parasitic on human diseased eyes. Sexual morph: Ascostromata immersed under a clypeus or epidermis, raised, visible as black dome-shaped or flattened ovoid areas on host surface, coriaceous, solitary to gregarious, black, central ostiolate. Peridium composed of several layers of light brown to brown, thin-walled cells of textura angularis, with flattened base. Pseudoparaphyses numerous, trabeculate, filiform, hyaline, anastomosing, branching at the apex, embedded in a gelatinous matrix. Asci 8-spored, bitunicate, cylindrical, short to long pedicellate, apically rounded with an ocular chamber. Ascospores uniseriate, ellipsoidal to fusiform, 1-septate, constricted at the septum, pale brown to brown or yellowish brown, rough-walled (Liu et al. 2014). Asexual morph: Coelomycetous. Conidiomata immersed to superficial, solitary to gregarious, globose to subglobose or irregular shape, uni- to multi-loculate. Pycnidial wall composed of several layers of cells of textura angularis. Conidiophores arising from the basal cavity, unbranched, aseptate. Conidiogenous cells annellidic, ampulliform or lageniform or cylindrical or cylindric-clavate, hyaline. Conidia oblong to ellipsoidal, hyaline, aseptate, smooth-walled. (Description from Liu et al. 2014)

 

Type species: Neoroussoella bambusae Phook., J.K. Liu & K.D. Hyde

 

Notes: Neoroussoella was introduced to accommodate the holomorphic species N. bambusae Phook. et al. collected on dead branch in Thailand (Liu et al. 2014). The asexual morph of N. bambusae was produced on bamboo pieces on WA and characterized by annellidic conidiogenous cells and oblong to ellipsoidal, hyaline conidia (Liu et al. 2014). Neoroussoella species formed a well-supported and distinct clade in Roussoellaceae (Jayasiri et al. 2019; Karunarathna et al. 2019; Phookamsak et al. 2019). Neoroussoella was considered to be different from Roussoella by relatively smaller, hyaline and smooth conidia, and phylogenetic analyses supported this conclusion (Liu et al. 2014; Jayasiri et al. 2019; Phookamsak et al. 2019). We re-collected N. bambusae Phook. et al. and N. leucaenae Jayasiri et al. from submerged wood in China. Neoroussoella bambusae has longitudinally ribbed ascospores, while N. leucaenae has smooth-walled ascospores. (Notes from Dong et al. 2020)

 

List of freshwater Neoroussoella species

Neoroussoella bambusae Phook., Jian K. Liu & K.D. Hyde, Phytotaxa 181(1): 23 (2014)

Freshwater distribution: China (Dong et al. 2020)

 

Neoroussoella leucaenae Jayasiri, E.B.G. Jones & K.D. Hyde, Mycosphere 10(1): 106 (2019)

Freshwater distribution: China (Dong et al. 2020)

 

Key to freshwater Neoroussoella species

1. Ascospores longitudinally ribbed....................... N. bambusae

1. Ascospores smooth-walled................................ N. leucaenae

 

References

Dong W, Wang B, Hyde KD, McKenzie EHC, Raja HA, Tanaka K, Abdel-Wahab MA, Abdel-Aziz FA, Doilom M, Phookamsak R, Hongsanan S, Wanasinghe DN, Yu X-D, Wang G-N, Yang H, Yang J, Thambugala KM, Tian Q, Luo Z-L, Yang J-B, Miller AN, Fournier J, Boonmee S, Hu D-M, Nalumpang S, Zhang H (2020) Freshwater Dothideomycetes. Fungal Divers 105:319–575

Jayasiri SC, Hyde KD, Jones EBG, McKenzie EHC, Jeewon R, Phillips AJL, Bhat DJ, Wanasinghe DN, Liu JK, Lu YZ, Kang JC, Xu JC, Karunarathna SC (2019) Diversity, morphology, and molecular phylogeny of Dothideomycetes on decaying wild seed pods and fruits. Mycosphere 10:1–186

Karunarathna A, Phookamsak R, Jayawardena RS, Cheewangkoon R, Hyde KD, Kuo CH (2019) The holomorph of Neoroussoella alishanense sp. nov. (Roussoellaceae, Pleosporales) on Pennisetum purpureum (Poaceae). Phytotaxa 406:218–236

Liu JK, Phookamsak R, Dai D, Tanaka K, Jones EBG, Xu JC, Chukeatirote E, Hyde KD (2014) Roussoellaceae, a new pleosporalean family to accommodate the genera Neoroussoella gen. nov. Roussoella and Roussoellopsis. Phytotaxa 181:1–33

Phookamsak R, Hyde KD, Jeewon R, Bhat DJ, Jones EBG, Maharachchikumbura SSN, Raspé O, Karunarathna SC, Wanasinghe DN, Hongsanan S, Doilom M, Tennakoon DS, Machado AR, Firmino AL, Ghosh A, Karunarathna A, Mešić A, Dutta AK, Thongbai B, Devadatha B, Norphanphoun C, Senwanna C, Wei D, Pem D, Ackah FK, Wang GN, Jiang HB, Madrid H, Lee HB, Goonasekara ID, Manawasinghe IS, Kušan I, Cano J, Gené J, Li J, Das K, Acharya K, Raj KNA, Latha KPD, Chethana KWT, He MQ, Dueñas M, Jadan M, Martín MP, Samarakoon MC, Dayarathne MC, Raza M, Park MS, Telleria MT, Chaiwan N, Matočec N, de Silva NI, Pereira OL, Singh PN, Manimohan P, Uniyal P, Shang QJ, Bhatt RP, Perera RH, Alvarenga RLM, Nogal-Prata S, Singh SK, Vadthanarat S, Oh SY, Huang SK, Rana S, Konta S, Paloi S, Jayasiri SC, Jeon SJ, Mehmood T, Gibertoni TB, Nguyen TTT, Singh U, Thiyagaraja V, Sarma VV, Dong W, Yu XD, Lu YZ, Lim YW, Chen Y, Tkalčec Z, Zhang ZF, Luo ZL, Daranagama DA, Thambugala KM, Tibpromma S, Camporesi E, Bulgakov TS, Dissanayake AJ, Senanayake IC, Dai DQ, Tang LZ, Khan S, Zhang H, Promputtha I, Cai L, Chomnunti P, Zhao RL, Lumyong S, Boonmee S, Wen TC, Mortimer PE, Xu JC (2019) Fungal diversity notes 929–1035: taxonomic and phylogenetic contributions on genera and species of fungi. Fungal Divers 95:1–273

 

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