Newly recognised lineages of perithecial ascomycetes: the new orders Conioscyphales and Pleurotheciales

Parafuscosporella garethii, a new freshwater taxon, is described and illustrated from submerged decaying twigs in a Thai community forest located in Chiang Mai Province. The species is recognized as the third species in the genus, and markedly differs from those previously accepted in the genus by its conidial size and shape and having two forms of conidiogenous cells. Phylogenetic analysis based on combined LSU, SSU and RPB2 sequence data place P. garethii in Fuscosporellales, Hypocreomycetidae, Sordariomycetes. The novel taxon is compared with morphologically and phylogenetically similar species in the genus and a taxonomic comparison to accepted Parafuscosporella species is also provided. Key words -E.B. Gareth Jones -freshwater fungi -Fuscosporellaceae -phylogeny -taxonomy IntroductionParafuscosporella (Fuscosporellaceae, Fuscosporellales, Hypocreomycetidae and Sordariomycetes) was introduced by Yang et al. (2016) with P. moniliformis and P. mucosa, as the type and second species in the genus, respectively. These two species were isolated from unidentified submerged twigs in a freshwater stream of Prachuap Khiri Khan Province, Thailand. The genus is characterized by partly immersed, partly superficial, septate, hyaline to pale brown mycelium; semi-macronematous, mononematous, branched, monoblastic, globose to subglobose, smooth-walled, hyaline conidiophores; and conidia that are ellipsoidal to broadly obpyriform, 1-septate, with a septum near the base, sometimes with a protuberance, and a smooth, dark brown to black, pale brown at basal cell (Yang et al. 2016).During a mycological survey of microfungi at a small stream located in a community forest in Chiang Mai Province, northern Thailand, P. garethii was found on submerged decaying twigs and is described as a new species here. The new taxon differs from other Parafuscosporella species in having two conidiophore types and in conidial shape and size. Phylogenetic evidence place the taxon in Fuscosporellales with strong bootstrap support. Parafuscosporella garethii is therefore introduced as a third species in the genus and is a novel freshwater taxon from Thailand.

Section: Phylogenetic Analysessupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Parafuscosporella garethii sp. nov. (Fuscosporellales) from a rivulet in a community-based northern forest, in Thailand

Boonyuen¹

2016

“…Phylogenetic trees obtained from ML, MP and Bayesian analyses yielded trees with similar overall topology at the order and family levels which are in agreement with previous studies (Boonyuen et al 2016, Réblová et al 2016, Yang et al 2016 ellipsoidal or slightly irregular shaped, 3860 × 25.537 μm (x ̅ = 48.5 × 30.5 μm, n = 40), dark brown to black, smooth, with pale brown cell at the apex and the base.…”

Section: Phylogenetic Resultssupporting

confidence: 80%

“…The taxa included in the phylogenetic analyses were selected and obtained from previous studies and GenBank (Maharachchikumbura et al 2015, Réblová et al 2016, Yang et al 2016. LSU and ITS gene regions were used for the combined sequence data analyses.…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

Two new species in Fuscosporellaceae from freshwater habitats in Thailand

Yang¹,

Liu²,

Hyde³

et al. 2017

A survey of freshwater fungi in Thailand resulted in the discovery of two new species in Fuscosporellaceae, herein described as Fuscosporella aquatica and Mucispora phangngaensis. Fuscosporella aquatica has sporodochial colonies, irregular ellipsoidal and dark brown conidia with vesicular conidiogenous cells. Mucispora phangngaensis has macronematous, solitary conidiophores with percurrent proliferations and dark brown obovoid conidia. Phylogenetic analysis based on combined LSU and ITS sequence data support their placement in Fuscosporella and Mucispora (Fuscosporellaceae, Fuscosporellales). Both species formed distinct clades from their type species and present as the second species in each genus. Descriptions and illustrations of the new taxa are provided. DNA sequence data of Parafuscosporella mucosa (from ex-type strain) are provided in this study, and confirmed its phylogenetic placement.

“…Réblová Réblová et al (2016b) introduced this genus with a hyphomycetous asexual morph. Molecular phylogenetic analyses showed that Melanotrigonum belongs in Pleurotheciaceae.…”

Section: Catenulomyces Egidi and De Hoogmentioning

confidence: 99%

Towards incorporating asexual fungi in a natural classification: checklist and notes 2012–2016

Wijayawardene¹

2017

Incorporating asexual genera in a natural classification system and proposing one name for pleomorphic genera are important topics in the current era of mycology. Recently, several polyphyletic genera have been restricted to a single family, linked with a single sexual morph or spilt into several unrelated genera. Thus, updating existing data bases and check lists is essential to stay abreast of these recent advanes. In this paper, we update the existing outline of asexual genera and provide taxonomic notes for asexual genera which have been introduced since 2012. Approximately, 320 genera have been reported or linked with a sexual morph, but most genera lack sexual morphs.