Pleosporales » Pleosporales genera incertae sedis

Fusiformiseptata

Fusiformiseptata W. Dong, H. Zhang & K.D. Hyde

Index Fungorum number: IF 557938; Facesoffungi number: FoF 09283

 

Saprobic on decaying wood submerged in freshwater. Sexual morph: Ascomata black, scattered, immersed with a neck erumpent through host surface, ellipsoidal or obovoid, coriaceous, ostiolate. Neck subcylindrical or irregular, with flattened top, thick-walled, composed of two-layered peridium, with orange pigment. Peridium comprising several layers of dark brown, thick-walled, compressed cells of textura epidermoidea or irregular cells. Pseudoparaphyses numerous, cellular, broadly filiform, hyaline, septate, branched. Asci 8-spored, bitunicate, clavate, short pedicellate, apically rounded with well-developed ocular chamber. Ascospores biseriate, fusiform, hyaline, septate, asymmetrical, thin walled. Asexual morph: Undetermined. (Notes from Dong et al. 2020).

 

Type species: Fusiformiseptata crocea W. Dong, H. Zhang & K.D. Hyde

 

Notes: Multigene phylogenetic analysis shows that our new collection MFLU 18-1721 forms an independent lineage in Pleosporales. Fusiformiseptata is therefore introduced for this freshwater taxon. Fusiformiseptata has a prominent neck with orange pigment on the inner wall and forms an arrow-shaped base to the ascomata. These characters are special in Pleosporales and warrant a new genus. (Description from Dong et al. 2020)

 

List of freshwater Fusiformiseptata species

Fusiformiseptata crocea W. Dong, H. Zhang & K.D. Hyde

Freshwater distribution: Thailand (Dong et al. 2020)

 

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

 

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