Three new species of foetid Gymnopus in New Zealand

Abstract

We describe three new species, Gymnopus imbricatus, G. ceraceicola and G. hakaroa, from New Zealand that are similar to G. foetidus (= Micromphale foetidum), growing on wood, with an insititious stipe and foetid odour. The position of these species within the /gymnopoid clade is confirmed by ITS sequence analysis.

New North American species of <em>Gymnopus</em>

“…Following Mata et al (2007), Micromphale taxa were transferred to Gymnopus. Recently, Cooper & Leonard (2013) described three Gymnopus taxa with foetid basidiomata from New Zealand, thus following Mata et al (2007) and Antonin & Noordeloos (2010).…”

“…Recently (Cooper & Leonard 2013), three species of Gymnopus belonging to the Micromphale complex were described from New Zealand. Gymnopus micromphaleoides basidiomata macroscopically resemble those of G. hakaroa in size, shape and habit, but ITS sequences are clearly separate.…”

Russulasubgen.Cremeoochraceaesubgen. nov.: a very small and ancient lineage sharing withMultifurca(Russulaceae) an identical, largely circum-Pacific distribution pattern

“…McNabb's species resembles in many ways R. inopina under the microscope because of the similar aspect of hyphal extremities in the pileus and the similar size and ornamentation of the spores. Russula cremeoochracea has always been described as lacking pileo-and caulocystidia (McNabb 1973;Cooper & Leonard 2014). However, dermatocystidia are actually present, both on the pileus and on the stipe surface, but are indeed difficult to trace because many are optically empty or have poorly visible contents that do not react in SV.…”

Russula(Basidiomycota, Russulales, Russulaceae) subsect.Roseinae“down under”

“…The copyright holder for this preprint this version posted August 18, 2023. ; https://doi.org/10.1101/2023.08.18.553850 doi: bioRxiv preprint Looney et al (2020) suggested a northern hemisphere distribution for Roseinae and inferred an Appalachian origin for the subsection in North America, followed by in situ diversification of these species in the Appalachian Mountains roughly since the mid-Miocene. Whereas published sequence data had already suggested the existence of several potential Roseinae in Oceania or Australasia (Buyck et al, 2018;Lebel & Tonkin, 2007;Cooper & Leonard, 2014: Cooper, 2021, none of these southern species has ever been discussed in the literature. The aim of this study is to identify the actual taxonomic status and phylogenetic position of these southern hemisphere relatives.…”