Two new species of Phylloporus (Fungi, Boletales) from tropical Quercus forests in eastern Mexico.

Leticia Montoya,Edith Garay-Serrano,Victor M Bandala

doi:10.3897/mycokeys.51.33529

Abstract

We present a proposal of two new species of Phylloporus discovered in tropical oak forests from central Veracruz, Mexico. Both species were distinguished based on macro and micro-morphologic features and supported with a molecular phylogenetic analysis, based on sequences of nuc rDNA ITS, D1, D2 and D3 domains of nuc 28S rDNA (LSU), and transcription elongation factor 1-alpha (tef-1α). In the phylogenetic reconstruction inferred, the new species clustered in two different clades related to species from USA, Costa Rica and Panama. The recollection of fructifications in monodominant stands of either Quercusoleoides or Q.sapotifolia, allowed recognizing the distribution of one of the Phylloporus species under both Quercus species, and the other under Q.oleoides only. Detailed macro and microscopic descriptions accompanied by illustrations, photos and a taxonomic discussion are provided.

Highlights

The genus Phylloporus is widely distributed worldwide with approximately 100 species occurring among conifers and broad-leaf trees as potential hosts (Neves 2007; OrtizSantana et al 2007; Neves and Halling 2010; Neves et al 2010, 2012; Zeng et al 2013; Ye et al 2014)
Another group of five sequences from Mexican specimens cluster in a well-supported clade (BS= 89%, PP= 1.0) sister to a sequence identified by those authors as P. purpurellus from Costa Rica
Within this latter Mexican clade, sequences recorded as NC 7285-1 and as NC 7286-1, of an unidentified Phylloporus species from USA, appear nested in the phylogeny, suggesting that they belong to the same taxon (Fig. 1)

Summary

Introduction

The genus Phylloporus is widely distributed worldwide with approximately 100 species occurring among conifers and broad-leaf trees as potential hosts (Neves 2007; OrtizSantana et al 2007; Neves and Halling 2010; Neves et al 2010, 2012; Zeng et al 2013; Ye et al 2014). Recent research on Phylloporus systematics revealed that some species placed under this genus in the past are related to other groups. Such is the case of P. boletinoides, that was found to be genetically distant, representing an independent genus, described recently as Phylloporopsis (Farid et al 2018). In the Neotropics, Quercus, Pinus, Abies, Alnus, Dicymbe, and Neea, represent some potential ectomycorrhizal hosts of Phylloporus spp. mentioned in the literature (Singer 1978, Montoya et al 1987; Montoya and Bandala 1991, Ortiz-Santana et al 2007, Neves 2007, Neves and Halling 2010)

Methods

Results

Conclusion