Category Archives: News

Research news: fungi papers published

During the last week, two papers were published by State Herbarium of South Australia‘s mycologist, Dr Teresa Lebel, and co-authors in the online version of the journal Mycologia:

Agaricus xanthodermus, p = pileus; s = stipe; a = annulus. Photo: A.-G. Boxshall.

(1) A.-G. Boxshall, J.L. Birch, T. Lebel, M.R.E. Symonds & D.L. Callahan (2021). A field-based investigation of simple phenol variation in Australian Agaricus xanthodermus. Mycologia (Publisher’s website).

Agaricus xanthodermus (yellow stainer) and other species of the yellow-staining Agaricus sect. Xanthodermatei are responsible for mushroom-related poisoning cases that require treatment. However, longstanding anecdotal evidence indicates that this species appears to exhibit considerable variation in toxicity, resulting in gastrointestinal irritation of varying severity in most cases. During her MSc research, the first author quantified the amount of phenol, hydroquinone and catechol in mushrooms and investigated their levels in different fungal structures, different developmental stages and on different nutritional substrates.

(2) J.I. de la Fuente, J.P. Pinzón, L. Guzmán-Dávalos, M.O. Uitzil-Colli, D. Gohar, T. Lebel, M. Bahram & J. García-Jiménez (2021). Revision of the genus Restingomyces, including two new species from Mexico. Mycologia (Publisher’s website).

The paper is the result of a long-standing collaboration to document the truffle diversity in American tropical regions. After a series of field surveys in southeastern Mexico, two new species in the phalloid genus Restingomyces (Trappeaceae, Phallales) were discovered. The authors describe them based on morphology and phylogenetic analyses of molecular data. Restingomyces guzmanianus and R. yaaxtax occur in medium-statured tropical dry forests. The original diagnosis of the genus Restingomyces is emended to include these novel species.

The new South American truffle Restingomyces guzmanianus, A = truffle cut in half, B = outside. Photo: J.I. de la Fuente et al.

New journal article: August 2021 (2)

The State Herbarium of South Australia published one short communication in Vol. 35 of its journal Swainsona online, today, 18 Aug. 2021.

xPhelodia tutelata. Illustration by F.J. Bradley, first published in Rogers (1906).

J. Kellermann & A. Monro, ×Phelodia, a new nothogenus in Australia Orchidaceae. (0.1mb PDF)

The recently published ×Glossadenia tutelata is a hybrid between the well-known orchids Glossodia major and Caladenia deformis. However, the latter species has now been transferred to another genus, Pheladenia. As the International Code of Nomenclature (ICN) prescribes that the names of hybrid genera consist of parts of the names of the parent genera, the hybrid genus ×Glossadenia needs to change its name, when the Caladenia deformis is accepted as Pheladenia deformis. The authors publish the new hybrid genus xPhelodia and the hybrid species xPhelodia tutelata to satisfy the requirements of the ICN.

To access content of all volumes of Swainsona and the Journal of the Adelaide Botanic Gardens since Vol. 1 (1976), please visit the journal’s web-site at flora.sa.gov.au/swainsona or the Swainsona back-up site.

Research news: fungi papers published

Lactifluus clarkeae, illustrated by Cleland (1934).

During the last week, two papers were published by State Herbarium of South Australia‘s mycologist, Dr Teresa Lebel, and co-authors:

(1) T. Lebel, J. Douch, L. Tegart, L. Vaughan, J.A. Cooper, J. Nuytinck (2021). Untangling the Lactifluus clarkeae – Lf. flocktoniae (Russulaceae) species complex in Australasia. Persoonia 47: 1-44.

The Lactifluus clarkeae complex is a commonly observed, generally brightly coloured, group of mushrooms that are usually associated with Nothofagus or myrtaceous hosts in Australia and New Zealand. For this study collections labelled as ‘Lactarius clarkeae’, ‘Russula flocktoniae’ and ‘Lactarius subclarkeae’ were examined. Analyses of molecular data showed a high cryptic diversity, with sequences scattered across 11 clades in three subgenera within Lactifluus, and a single collection in Russula. Untangling this complex will enable better identification of species and increase understanding of diversity and specific habitat associations of macrofungi.

(2) N. Davoodian, T. Lebel, M.A. Castellano, K. Hosaka (2021). Hysterangiales revisited: expanded phylogeny reveals new genera and two new suborders. FUSE 8: 65-80.

Hysterangiales (Phallomycetidae, Agaricomycetes, Basidiomycota) is a diverse, nearly cosmopolitan order of predominantly hypogeous, sequestrate, ectomycorrhizal fungi. The authors recovered 26 provisional novel genera, and corroborated existing genera and families. Two new suborders (Phallogastrineae and Hysterangineae) and a new family (Phallogastraceae) are described, and three new combinations made to the genus Phallogaster.

Three examples of the newly described fungi family Phallogastraceae. Images published in Davoodian et al (2021).

Research news: fungi paper published

The State Herbarium of South Australia‘s mycologist, Dr Teresa Lebel, published the following paper with her co-authors, yesterday, in the journal Fungal Systematics and Evolution (FUSE):

T. Lebel, J.A. Cooper, M.A. Castellano & J. Nuytinck (2021). Three independent evolutionary events of sequestrate Lactifluus species in Australasia. FUSE 8: 9-25 (open access).

Three Australian species of fungi with sequestrate (truffle-like) basidiome forms are recorded for the first time in the genus Lactifluus (milk-caps) based on nuclear ITS-LSU DNA sequences and morphological data. These species represent three rare independent evolutionary events resulting in truffle-like basidiomes arising from agaricoid (typical mushroom forms) species in three different sections in two subgenera. All three species have highly reduced basidiome forms, and no species with intermediate forms have been found.

Lactifluus dendriticus (T. Lebel) T. Lebel, J. Cooper & Nuytinck (originally described as Zelleromyces dendriticus) is unique in the genus Lactifluus in having highly branched, dendritic terminal elements in the pileipellis. One other new species is formally described in this paper: Lactifluus geoprofluens T. Lebel, Castellano, Claridge & Trappe. The third taxon is only given the informal name Lactifluus sp. prov. KV181, as not enough material was available for a detailled description.

The mushroom-like Lactifluus wirrabara (A) and its close relative, the truffle-like Lactifluus dendriticus (B). Photos: T. Lebel.