Publication Date:
2024-04-15
Description:
As currently delineated, Hygrophorus sect. Olivaceoumbrini is a polyphyletic assembly within subg.
Colorati, encompassing glutinous and pigmented taxa. According to available literature, between a dozen and
twenty species may belong in the section, mostly represented in continental and boreal forests of Europe and North
America. However, the limited phylogenetic and biogeographic coverage of the genus does not presently allow
for a reliable assessment of its taxonomic boundaries, nor does it provide a complete picture of species diversity
within sect. Olivaceoumbrini. In an ongoing effort to confer an evolutionary backbone to Hygrophorus systematics,
we assembled and analysed a dataset comprising 268 intercontinental sequences, including holotypes of 7 taxa
previously not positioned phylogenetically, and enriched with collections from largely unexplored Mediterranean and
Anatolian ecosystems. Overall, 30 clades are identified within 5 distinct lineages, including 11 species putatively new to
science. Seven of these are formally described here as H. agathosmoides, H. albofloccosus, H. canadensis, H. limosus, H. marcocontui, H. pinophilus and H. pustulatoides spp. nov. This enriched coverage of section Olivaceoumbrini
s.lat. calls for a re-evaluation of its natural boundaries into a core monophyletic clade, including H. olivaceoalbus
and five closely related lookalikes, as well as the assignment of the section rank to the four remaining lineages:
sect. Fuscocinerei sect. nov., sect. Limacini sect. nov., sect. Nudolidi sect. nov. and sect. Tephroleuci, respectively.
We also stabilize the usage of six historical names, H. glutinifer, H. hyacinthinus, H. mesotephrus, H. olivaceoalbus, H. pustulatus and H. tephroleucus, through designation of two neotypes, three lectotypes and four epitypes.
Keywords:
Ecology
;
Evolution
;
Behavior and Systematics
;
Hygrophorus latitabundus
;
Hygrophorus olivaceoalbus
;
Hygrophorus persoonii
;
phylogeny
;
taxonomy
;
waxcap
Repository Name:
National Museum of Natural History, Netherlands
Type:
info:eu-repo/semantics/article
Format:
application/pdf
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