Publication Date:
2024-03-06
Description:
The genus Podaxis was first described from India by Linnaeus in 1771, but several revisions of the
\ngenus have left the taxonomy unclear. Forty-four Podaxis species names and nine intraspecific varieties are currently accepted, but most fungarium specimens are labelled Podaxis pistillaris. Recent molecular analyses based
\non barcoding genes suggest that the genus comprises several species, but their status is largely unresolved. Here
\nwe obtained basidiospores and photographs from 166 fungarium specimens from around the world and generated
\na phylogeny based on rDNA internal transcribed spacer ITS1, 5.8S and ITS2 (ITS), and a phylogenomic analysis of
\n3839 BUSCO genes from low-coverage genomes for a subset of the specimens. Combining phylogenetics, phylogenomics, morphology, ecology, and geographical distribution, spanning 250 years of collections, we propose that
\nthe genus includes at least 16 unambiguous species. Based on 10 type specimens (holotype, paratype, and syntype),
\nfour recorded species were confirmed, P. carcinomalis, P. deflersii, P. emerici, and P. farlowii. Comparing phylogenetic
\nanalysis with described species, including morphology, ecology, and distribution, we resurrected P. termitophilus
\nand designated neotypes, epitypes, or lectotypes for five previously described species, P. aegyptiacus, P. africana,
\nP. beringamensis, P. calyptratus, and P. perraldieri. Lastly, based on phylogenies and morphology of type material,
\nwe synonymized three reported species, P. algericus, P. arabicus, and P. rugospora with P. pistillaris, and described
\nfive new species that we named P. desolatus, P. inyoensis, P. mareebaensis, P. namaquensis, and P. namibensis.
Keywords:
Agaricaceae
;
ecology
;
fungaria
;
geography
;
museomics
;
novel species
;
phylogenomics
;
Podaxis
;
typification
Repository Name:
National Museum of Natural History, Netherlands
Type:
info:eu-repo/semantics/article
Format:
application/pdf
Permalink
