Diversity of the genus Sugiyamaella and description of two new species from rotting wood in China.

Cheng-Feng Shi,Kai-Hong Zhang,Zhen-Li Yan,Chun-Yue Chai,Feng-Li Hui

doi:10.3897/mycokeys.77.60077

Abstract

Species of the genus Sugiyamaella (Trichomonascaceae, Saccharomycetales), found in rotting wood in China, were investigated using morphology and the molecular phylogeny of a combined ITS and nrLSU dataset. Nine taxa were collected in China: two were new species (viz. Sugiyamaella chuxiongsp. nov. and S. yunanensissp. nov.) and seven were known species, S. americana, S. ayubii, S. novakii, S. paludigena, S. valenteae, S. valdiviana and S. xiaguanensis. The two new species are illustrated and their morphology and phylogenetic relationships with other Sugiyamaella species are discussed. Our results indicate a potentially great diversity of Sugiyamaella spp. inhabiting rotting wood in China just waiting to be discovered.

Highlights

Sugiyamaella Kurtzman & Robnett (2007) is typified by Sugiyamaella smithiae, which was initially classified in the genus Stephanoascus (Giménez-Jurado et al 1994)
S. ayubii, S. bahiana, S. bonitensis, S. carassensis, S. ligni, S. mastotermitis, S. trypani, S. valenteae, S. xiaguanensis, S. xylolytica and S. xylanicola were added to this genus (Morais et al 2013; Handel et al 2016; Sena et al 2017; Huang et al 2018; Crous et al 2019)
S. chuxiong and S. yunanensis are proposed as new species in Sugiyamaella for their distinct phylogenic positions and distinctive physiological traits

Summary

Introduction

Sugiyamaella Kurtzman & Robnett (2007) is typified by Sugiyamaella smithiae, which was initially classified in the genus Stephanoascus (Giménez-Jurado et al 1994). Kurtzman (2011) accepted four species in Sugiyamaella and proposed a key for this genus, based mainly on the reactions on standard growth and fermentation tests. Within the same time frame, 14 Candida species in this clade were transferred to the genus Sugiyamaella as new combinations, based on their phylogeny (Urbina et al 2013; Handel et al 2016). 29 species were included in this genus before our study, 25 were asexual morphs and four had known ascosporic states, viz. S_americana, S. chiloensis, S. japonica and S. smithiae (Kurtzman 2007; Kurtzman and Robnett 2007; Morais et al 2013; Handel et al 2016; Sena et al 2017; Huang et al 2018; Crous et al 2019). The other useful morphological feature is that pseudohyphae and true hyphae are commonly formed (Kurtzman and Robnett 2007; Kurtzman 2011; Sena et al 2017)

Methods

Results

Conclusion