Two New Species of Sidera (Hymenochaetales, Basidiomycota) from Southwest China

Abstract

Two new wood-inhabiting fungi, Sidera salmonea sp. Nov. and S. tibetica sp. Nov. in the order Hymenochaetales from southwest China, are described and illustrated based on molecular and morphological evidence. They were found on gymnosperm wood that is rotten and charred. The characteristics of S. salmonea include annual, resupinate basidioma, salmon pores with distinctly white margins, angular pores (7–9 per mm), a dimitic hyphal system, and lunate basidiospores that are 3–3.5 × 0.9–1.1 μm. The characteristics of S. tibetica include annual, resupinate basidioma with a white to cream fresh pore surface that becomes cream to honey-yellow and shiny when dry, round pores (7–8 per mm), a dimitic hyphal system, and lunate basidiospores that measure 2.9–3.1 × 1–1.1 μm. A phylogenetic analysis based on the combined 2-locus dataset (5.8S + nuclear large subunit RNA (nLSU)) shows that the two species are members of the genus Sidera, and they are morphologically compared with related species, respectively. This paper provides a key to the identification of 16 accepted species of Sidera that are found throughout the world.

Ceriporiopsis tianshanensis (Polyporales, Agaricomycetes) and Sidera tianshanensis (Hymenochaetales, Agaricomycetes), two new species of wood-inhabiting fungi from Xinjiang, Northwest China

“…2 ). However, Sidera salmonea is distinguished from S. tianshanensis by its shape and size of the basidiospores (3–3.5 × 0.9–1.1 µm, Q = 3.03–3.21, lunate vs. 3–3.5 × 1–1.4 µm, Q = 2.6–2.7, allantoid), smaller pores (7–9 per mm vs. 5–7 per mm), and surface of basidiocarps being salmon to slightly shiny, while that of the latter is cream to rosy buff ( Liu et al 2022 ). Morphologically, Sidera tianshanensis is similar to S. parallela , both presenting cream to buff yellow pore surfaces and the pore sizes were similar ( Du et al 2020 ).…”

“…Bononi & Hjortstam and Skvortzovia furfuracea (Bres.) G. Gruhn & Hallenberg were used as outgroups in the phylogeny of Sidera ( Liu et al 2022 ).…”

“…Liu, Jian Yu & F. Wu ( Liu et al 2023b ). The genus causes a white rot in the wood, and is characterized by resupinate basidiocarps that are white to cream or buff, mostly waxy when fresh, with a poroid or hydnoid hymenophore, monomitic or dimitic hyphal system with generative hyphae bearing clamp connections, the presence of rosette-like crystals and allantoid to lunate basidiospores ( Miettinen and Larsson 2011 ; Du et al 2020 ; Liu et al 2021b , 2022 ). In phylogenetic analysis, Sidera is a monophyletic genus and clustered into the Rickenella clade ( Liu et al 2021b , 2022 , 2023b ).…”

Taxonomy and phylogeny of Sidera (Hymenochaetales, Rickenella clade) from China and North America revealing two new species

“… Sidera , a genus with mostly poroid hymenophore of wood-inhabiting fungi distributed in most continents except Africa ( Miettinen and Larsson 2011 ; Liu et al 2022 ; Wu et al 2022a ), is treated as a member of Rickenella clade within Hymenochaetales , with Sidera lenis as the generic type. To date, 16 species are accepted in Sidera ( Miettinen and Larsson 2011 ; Du et al 2019 , 2020 ; Liu et al 2021 , 2022 ). Seven species of Sidera have previously been recorded from China: S. inflata Z.B.…”

“…The main characteristics of Sidera species. Pore and basidiospore sizes mainly fromLiu et al (2022). New species are shown in bold.…”