Tirisporellales » Tirisporellaceae

Thailandiomyces

Thailandiomyces Pinruan, Sakay., K.D. Hyde & E.B.G. Jones, Fungal Diversity 29: 91 (2008)

            Diaporthomycetidae, Tirisporellales, Tirisporellaceae, Thailandiomyces

            Index Fungorum number: IF511583; Facesoffungi number: FoF 04326, 1 morphological species; 1 species with sequence data

 

Saprobic on submerged substrates in freshwater habitas. Sexual morph: Ascomata scattered to gregarious, semi-immersed to superficial, globose, black, coriaceous, ostiolate, with long cylindrical necks, periphysate with short hyaline cells. Peridium composed of compressed cells of textura angularis, black outside, becoming brown inwardly. Paraphyses present but deliquescent, irregular in width, rarely septate, tapering towards the apices, embedded in a mucilaginous matrix. Asci 8-spored, unitunicate, cylindrical to clavate, apedicellate, free-floating, apically truncate, with a J- subapical ring. Ascospores uniseptate, obliquely overlapping 2-seriate, fusoid, straight or broadly curved, with bipolar appendages, hyaline, smooth-walled. Asexual morph: Colonies on natural substrate effuse, black. Mycelium superficial. Conidiophores macronematous, mononematous, erect, brown, paler towards the apex, straight or flexuous, branched or unbranched. Conidiogenous cells enteroblastic, monophialidic, integrated, terminal, with a large and distinct collarette; collarette funnel-shaped. Conidia cylindrical, ellipsoid or obovoid, thick-walled, brown, aseptate (Luo et al. 2019).

 

Type species: Thailandiomyces bisetulosus Pinruan, Sakay., K.D. Hyde & E.B.G. Jones, Fungal Diversity 29: 91 (2008)

 

Notes: Pinruan et al. (2008) introduced Thailandiomyces to accommodate a single species T. bisetulosus and described its asexual morph in Craspedodidymum. Their phylogenetic analysis based on LSU and SSU sequence data showed that the genus was well-placed in Diaporthales, but differed from Diaporthe species in morphology. It was therefore not referred to any family (Pinruan et al. 2008). Suetrong et al. (2015) conducted phylogenetic analysis of Tirisporella beccariana and revealed that Thailandiomyces formed a sister clade to Tirisporella and therefore included Thailandiomyces in Tirisporellaceae. Thailandiomyces bisetulosus is distinct from other members in Tirisporellaceae by its hyaline ascospores with bipolar appendages. Thailandiomyces bisetulosus resembles the morphologies of Diaporthales, including its saprobic habitat on decaying plant material, partially-immersed ascomata, long periphysate necks, unbranched paraphyses that deliquesce early in development, unitunicate asci that float free in the centrum and asci with a refractive, J-, apical ring (Barr 1991, Samuels & Blackwell 2001). The genus is monotypic.

 

References:

Barr ME. 1991 – Revisions and additions to the Diaporthales. Mycotaxon 41, 287–305.

Luo ZL, Hyde KD, Liu JK, Maharachchikumbura SSN et al. 2019 – Freshwater Sordariomycetes. Fungal Diversity 99, 451–660.

Pinruan U, Lumyong S, McKenzie EH, Jones EBG et al. 2004 – Three new species of Craspedodidymum from palm in Thailand. Mycoscience 45, 177–180.

Pinruan U, Sakayaroj J, Hyde KD, Jones EBG. 2008 – Thailandiomyces bisetulosus gen. et sp. nov. (Diaporthales, Sordariomycetidae, Sordariomycetes) and its anamorph Craspedodidymum, is described based on nuclear SSU and LSU rDNA sequences. Fungal Diversity 29, 89–98.

Samuels GJ, Blackwell M. 2001 – Pyrenomycetes — Fungi with Perithecia. In: McLaughlin DJ, McLaughlin EG, Lemke PA (eds). The Mycota VII Part A. Springer, Berlin 221–255.

Suetrong S, Klaysuban A, Sakayaroj J, Preedanon S et al. 2015 – Tirisporellaceae, a new family in the order Diaporthales (Sordariomycetes, Ascomycota). Cryptogamie Mycologie 36, 319–330.

 

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