Rediscovery of the Patagonian mushroom Austroomphaliaster nahuelbutensis 41 years after the type collection

Daniela Torres; Fernando Moro Cordobés; Giuliana Furci; Francia Álvarez-Navarro; Goetz Palfner; Claudia Bustamante; Francisco Kuhar

doi:10.30550/j.lil/2151

Authors

Daniela Torres Fungi Foundation. Santiago, Chile. https://orcid.org/0000-0003-3452-7081
Fernando Moro Cordobés Innomy Biotech. País Vasco. https://orcid.org/0000-0001-5285-8955
Giuliana Furci Fungi Foundation. Santiago, Chile. Department of Organismic and Evolutionary Biology, Faculty of Arts and Sciences, Harvard University, Cambridge, Massachusetts, USA. https://orcid.org/0000-0001-7937-650X
Francia Álvarez-Navarro Laboratorio de Micología y Micorrizas, Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile. Fundación Pewenkem, Angol, Chile. https://orcid.org/0009-0003-4000-1331
Goetz Palfner Laboratorio de Micología y Micorrizas, Departamento de Botánica, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile. https://orcid.org/0000-0001-6098-728X
Claudia Bustamante Funga Endémica. Santiago, Chile. https://orcid.org/0009-0001-2617-9593
Francisco Kuhar Instituto Multidisciplinario de Biología Vegetal (CONICET-UNC). Córdoba, Argentina. https://orcid.org/0000-0003-4482-4231

DOI:

https://doi.org/10.30550/j.lil/2151

Keywords:

Patagonia, Nahuelbuta, Conservation, Fayodiaceae, Omphalinoid

Abstract

Erected by Garrido in 1988, the genus Austroomphaliaster contains a single species, A. nahuelbutensis, which has not been cited again since its original description. Despite numerous expeditions across the Nothofagus forests, the species remains unlocated, and no morphological or molecular studies of the type have been published ever since. In 2023, an expedition led by the Fungi Foundation aimed to search for this lost species, resulting in the collection of two specimens consistent with the original description. One year later, mycologists from the University of Concepción found the same species a few kilometers from the type locality. A morphological revision of the reference materials, along with a phylogenetic study that included type ITS and LSU sequences, confirmed its identity. Our study places this putatively saprotrophic species within the family Fayodiaceae. Austroomphaliaster nahuelbutensis appears to have a very restricted distribution and should be included in conservation programs.

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