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The taxonomy of sterile Arthoniaceae from Brazil: white crusts on overhanging tropical trees can be named

Published online by Cambridge University Press:  28 February 2024

André Aptroot Open the ORCID record for André Aptroot [Opens in a new window] ,
Marcela Eugenia da Silva Cáceres Open the ORCID record for Marcela Eugenia da Silva Cáceres [Opens in a new window]  and
Lidiane Alves dos Santos
André Aptroot*
Affiliation:
Laboratório de Botânica/Liquenologia, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, CEP 79070-900, Campo Grande, Mato Grosso do Sul, Brazil
Marcela Eugenia da Silva Cáceres
Affiliation:
Departamento de Biociências, Universidade Federal de Sergipe, CEP 49500-000, Itabaiana, Sergipe, Brazil
Lidiane Alves dos Santos
Affiliation:
Departamento de Biociências, Universidade Federal de Sergipe, CEP 49500-000, Itabaiana, Sergipe, Brazil
*
Corresponding author: André Aptroot; Email: andreaptroot@gmail.com
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Abstract

Twelve new lichen species are described in the family Arthoniaceae. All are sterile white crusts growing on overhanging trees (and one on living palm fronds) in ten different states in tropical Brazil. In the tropics, sterile crusts so far have been mostly disregarded. They are all characterized by their chemistry and morphology, often including pseudoisidia or soredia, but their phylogenetic relationships have been investigated with sequencing. The following species are described: Arthonia farinosorediata, with shallow soralia and without secondary metabolites; Crypthonia irregularis, with irregular isidia, confluentic acid and sometimes 2ʹ-O-methylperlatolic acid; Crypthonia pseudisidiata, with soft pseudoisidia and without secondary metabolites; Crypthonia stromatica, with sterile stromata and confluentic acid; Cryptophaea constrictopseudisidiata with pseudoisidia, lichexanthone and confluentic acid; Cryptophaea lichexanthopseudisidiata with pseudoisidia and lichexanthone; Cryptophaea lichexanthosorediata with soredia, lichexanthone and divaricatic acid; Cryptothecia lecanorosorediata with soredia and lecanoric acid; Glomerulophoron confluentisorediatum with soredia, confluentic and 2ʹ-O-methylperlatolic acids; Herpothallon psorpseudisidiatum on living palm fronds with a strongly attached thallus, long pseudoisidia and psoromic acid; Myriostigma minisorediatum with soredia and 2ʹ-O-methylperlatolic acid; Pachnolepia longipseudisidiata with long pseudoisidia, and a thallus containing lichexanthone, confluentic acid and 2ʹ-O-methylperlatolic acid.

Keywords

ArthoniabiodiversityCrypthoniaCryptophaeaCryptotheciaGlomerulophoronHerpothallonlichenMyriostigmaPachnolepiarainforest
Type
Standard Paper
Information
The Lichenologist , Volume 56 , Issue 1 , January 2024 , pp. 1 - 13
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Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of The British Lichen Society

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