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Issue: Vol. 597 No. 2: 12 May 2023
Type: Article
Published: 2023-05-12
DOI: 10.11646/phytotaxa.597.2.7
Page range: 175-183
Abstract views: 94
PDF downloaded: 3

Thismia pseudomelanomitra (Thismiaceae), a new mycoheterotrophic species from Brazilian Amazon Forest

Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, 22460-030, Rio de Janeiro, RJ, Brazil
Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, 05508-090, São Paulo, SP, Brazil
Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, Rua Pacheco Leão, 915, 22460-030, Rio de Janeiro, RJ, Brazil
Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand. Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan Province, China. Innovative Agriculture Research Centre, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand Innovative Agriculture Research Centre, Faculty of Agriculture, Chiang Mai University Chiang Mai 50200 Thailand.
Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand. School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand.
College of Agronomy and Biosciences, Dali University, Dali 671003, Yunnan Province, China
Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan Province, China
Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai, 50200, Thailand. Innovative Agriculture Research Centre, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand Innovative Agriculture Research Centre, Faculty of Agriculture, Chiang Mai University Chiang Mai 50200 Thailand.
1 new taxon Freshwater fungi Pairwise homoplasy index test Sordariomycetes Fungi

Abstract

A new species of Thismia is described and illustrated for the Brazilian Amazon Forest. Thismia pseudomelanomitra belongs to Thismia subg. Ophiomeris sect. Pyramidalis and is morphologically similar to T. melanomitra. However, it can be recognized by its orbicular outer tepals with revolute margins, inner tepals connate over the tube opening forming a subglobose mitre, outer surface bearing prominent irregularly dentate ribs and irregularly foveae on top. The new species is known from a single locality, collected at São Nicolau Farm, in the northwest of Mato Grosso State. Herein, we provide a detailed description with illustrations, photographic plates, distribution maps, and preliminary conservation status.

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