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Issue: Vol. 633 No. 3: 9 Jan. 2024
Type: Article
Published: 2024-01-09
DOI: 10.11646/phytotaxa.633.3.5
Page range: 253-264
Abstract views: 323
PDF downloaded: 6

Pseudosperma calciphilum (Inocybaceae), a new Mediterranean species from Sardinia (Italy), Malta, and Valencia (Spain)

Associazione Micologica Bresadola; Gruppo ‘Sette Fratelli’;Via Cavaro 45; 09131 Cagliari (CA); Italy
Department of Biomedical Sciences; University of Cagliari; 09042 Monserrato (CA); Italy
EcoGozo Directorate; Ministry for Gozo; VCT1335 Victoria; Gozo; Malta
Departament de Botànica i Geologia; Facultat de Ciències Biològiques; Universitat de València; C/ Doctor Moliner 50; E- 46100 Burjassot; València; Spain
Department of Biomedical Sciences; University of Cagliari; 09042 Monserrato (CA); Italy
EcoGozo Directorate; Ministry for Gozo; VCT1335 Victoria; Gozo; Malta
Departament de Botànica i Geologia; Facultat de Ciències Biològiques; Universitat de València; C/ Doctor Moliner 50; E- 46100 Burjassot; València; Spain
Fungi Agaricomycetes Basidiomycota fungal biogeography molecular systematics taxonomy

Abstract

A complete description is provided for Pseudosperma calciphilum (Inocybaceae, Agaricales), a new basidiomycete species from Sardinia (Italy), Malta, and Valencia (Spain) in Europe, along with colour photographs of its macro- and microscopic characters and a comparative study of the similarities and differences from its closest allies. The new species occurs on calcareous soils in Mediterranean habitats preferably under Quercus ilex subsp. ilex and Q. ilex subsp. rotundifolia. Pseudosperma conviviale resembles P. calciphilum in some macro- and microscopic features, but the latter is distinguished by having white velar remnants on pileus, larger spores and by its ecology, as it apparently grows exclusively on calcareous soils. The phylogenetic analyses based on nrITS and nrLSU nucleotide sequence data confirmed that the new species is a member of the former Inocybe section Rimosae sensu stricto, whose species are currently placed in the genus Pseudosperma. The closest relatives are P. melleum, P. conviviale, P. melliolens and P. umbrinellum, from which the new Mediterranean species is well distinguished both morphologically and genetically.

 

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