Pleosporales » Lophiostomataceae

Flabellascoma

Flabellascoma A. Hashim., K. Hiray. & Kaz. Tanaka

Index Fungorum number: IF 823133

 

Saprobic on plant materials and submerged wood. Sexual morph: Ascomata scattered, immersed with neck erumpent through host surface, subglobose to ellipsoidal. Ostiolar neck elongate, laterally compressed. Peridium composed of elongate, brown to dark brown cells. Pseudoparaphyses numerous, cellular, hypha-like, hyaline, septate, branching and anastomosing. Asci 8-spored, bitunicate, fissitunicate, cylindrical-clavate. Ascospores fusiform, hyaline, septate, with a narrow, bipolar sheath (Hashimoto et al. 2018). Asexual morph: Coelomycetous. Conidiomata pycnidial, globose to subglobose. Peridium composed of subglobose to rectangular, brown cells. Conidiophores absent. Conidiogenous cells holoblastic, cylindrical or ampliform, hyaline, smooth. Conidia subglobose with rounded ends, hyaline, smooth, aseptate (Hashimoto et al. 2018). (Description from Dong et al. 2020)

 

Type species: Flabellascoma minimum A. Hashim., K. Hiray. & Kaz. Tanaka

 

Notes: Flabellascoma was introduced to accommodate F. cycadicola A. Hashim. et al. and F. minimum. Flabellascoma is morphologically similar to Pseudolophiostoma in ascomata with a well-developed, crestlike ostiolar neck (Thambugala et al. 2015; Hashimoto et al. 2018), but phylogeny separates them as distinct genera (Hashimoto et al. 2018; Dong et al. 2020). Two freshwater species F. aquaticum D.F. Bao et al. and F. fusiforme D.F. Bao et al. are morphologically very similar, the former has a long, cylindrical neck, but the latter has a short, crest-like neck (Bao et al. 2019). They also can be distinguished by the size of asci. (Notes from Dong et al. 2020)

 

List of freshwater Flabellascoma species

Flabellascoma aquaticum D.F. Bao, Z.L. Luo, K.D. Hyde & H.Y. Su, Mycosphere 10, 1085 (2019)

Freshwater distribution: China (Bao et al. 2019)

 

Flabellascoma fusiforme D.F. Bao, Z.L. Luo, K.D. Hyde & H.Y. Su, Mycosphere 10, 1089 (2019)

Freshwater distribution: China (Bao et al. 2019; Dong et al. 2020)

 

Key to freshwater Flabellascoma species

1. Asci 66–80 × 10–12 μm............................................................... F. fusiforme

1. Asci 48–72 × 8–9 μm................................................................. F. aquaticum

 

References

Bao DF, Su HY, Maharachchikumbur SSN, Liu JK, Nalumpang S, Luo ZL, Hyde KD (2019) Lignicolous freshwater fungi from China and Thailand: Multi-gene phylogeny reveals new species and new records in Lophiostomataceae. Mycosphere 10:1080–1099

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

Hashimoto A, Hirayama K, Takahashi H, Matsumura M, Okada G, Chen CY, Huang JW, Kakishima M, Ono T, Tanaka K (2018) Resolving the Lophiostoma bipolare complex: generic delimitations within Lophiostomataceae. Stud Mycol 90:161–189

Thambugala KM, Hyde KD, Tanaka K, Tian Q, Wanasinghe DN, Ariyawansa HA, Jayasiri SC, Boonmee S, Camporesi E, Hashimoto A, Hirayama K, Schumacher RK, Promputtha I, Liu ZY (2015) Towards a natural classification and backbone tree for Lophiostomataceae, Floricolaceae, and Amorosiaceae fam. nov. Fungal Divers 74:199–266

 

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