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Issue: Vol. 446 No. 1: 26 May 2020
Type: Article
Published: 2020-05-26
DOI: 10.11646/phytotaxa.446.1.8
Page range: 61–71
Abstract views: 33
PDF downloaded: 2

Morphological and molecular evidence for two new species of Absidia from Neotropic soil

Post-graduate course in the Biology of Fungi. Department of Mycology. Federal University of Pernambuco.
Post-graduate course in the Biology of Fungi. Department of Mycology. Federal University of Pernambuco.
Post-graduate course in the Biology of Fungi. Department of Mycology. Federal University of Pernambuco.
Post-graduate course in the Biology of Fungi. Department of Mycology. Federal University of Pernambuco.
Environmental Microbiology Lab, Dept. of Agricultural Biological Chemistry, College of Agriculture & Life Sciences, Chonnam National University
Post-graduate course in the Biology of Fungi. Department of Mycology. Federal University of Pernambuco.
Post-graduate course in the Biology of Fungi. Department of Mycology. Federal University of Pernambuco.
Cunninghamellaceae Mucorales Mucoromycota taxonomy Fungi

Abstract

During a survey of the diversity of Mucorales in Atlantic Forest and upland rainforest soils in northeastern Brazil, two strains belonging to Absidia were isolated. These strains are morphologically and molecularly (nuc rDNA internal transcribed spacer ITS1–5.8–ITS2 and D1–D2 domains of nuc 28S rDNA) distinct from other Absidia species. Absidia cornuta sp. nov. presents exclusively cylindrical sporangiospores and up to three projections on columellae. Absidia pernambucoensis sp. nov. presents up to two apical projections on columellae and produces two types of sporangiospores: cylindrical and slightly cuneiform. Based on morphological and phylogenetic evidence, two new species of Absidia are proposed. An identification key for the species of Absidia with cylindrical sporangiospores found in the Neotropics is provided.