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Issue: Vol. 176 No. 1: 20 August 2014
Type: Article
Published: 2014-08-20
DOI: 10.11646/phytotaxa.176.1.15
Page range: 156–163
Abstract views: 30
PDF downloaded: 23

Homortomyces tamaricis sp. nov. and convergent evolution of Homortomyces and Stilbospora

Guizhou Animal Husbandry and Veterinary Institute, Guiyang, P.R. China, 550005 Institute of Excellence in Fungal Research and 3School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
Institute of Excellence in Fungal Research and 3School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
A.M.B. Gruppo Micologico Forlivese “Antonio Cicognani”, Via Roma 18, Forlì, Italy; A.M.B. Circolo Micologico “Giovanni Carini”, C.P. 314, Brescia, Italy; Società per gli Studi Naturalistici della Romagna, C.P. 144, Bagnacavallo (RA), Italy
Institute of Excellence in Fungal Research and 3School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand Formerly, Department of Botany, Goa University, Goa 403 206, India
Department of Plant Pathology, Agriculture College, Guizhou University, 550025, P.R. China
Institute of Excellence in Fungal Research and 3School of Science, Mae Fah Luang University, Chiang Rai, 57100, Thailand
Department of Plant Pathology, Agriculture College, Guizhou University, 550025, P.R. China
Guizhou Animal Husbandry and Veterinary Institute, Guiyang, P.R. China, 550005
coelomycetous fungi molecular taxonomy morphology phylogenetics

Abstract

A new species Homortomyces tamaricis is introduced from Cervia, Italy. It is distinct from H. combreti, the type species of this monotypic genus, in having smaller conidia, smaller paraphyses and shorter supporting cells. Morphologically Homortomyces is similar to Stilbospora, which groups in Diaporthales incertae sedis in maximum-likelihood analysis of LSU rDNA sequences. Maximum-likelihood analysis of the combined data set of LSU and ITS rDNA sequences indicates that Homortomyces species cluster with Tubeufiaceae with 77% bootstrap support, but group as a distinct clade with high bootstrap value (100%). These two genera show convergent evolution since both share very similar morphological characters, but have distinct phylogenetic lineages. Further phylogenetic analyses are needed, when more strains of Homortomyces and related genera are available, to resolve the genus familial placement. We maintain the genus in Dothideomycetes incertae sedis. No sexual state has yet been reported for this genus.