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New species of Arthoniales from Cape Verde with an enlarged concept of the genus Ingaderia

Published online by Cambridge University Press:  15 March 2023

Damien Ertz*
Meise Botanic Garden, Department Research, Nieuwelaan 38, BE-1860 Meise, Belgium Fédération Wallonie-Bruxelles, Service Général de l'Enseignement Supérieur et de la Recherche Scientifique, Rue A. Lavallée 1, B-1080 Bruxelles, Belgium
Anders Tehler
Department of Botany, Swedish Museum of Natural History, P.O. Box 50007, S-104 05 Stockholm, Sweden
Author for correspondence: Damien Ertz. E-mail:


Three new species of Arthoniales are described from Cape Verde: Ingaderia dendritica, with ascomata formed of richly branched-dendroid lirellae and containing erythrin; Sparria caboverdensis, with small stroma-like ascomata and ascospores with 3–7 transverse septa; and Syncesia miesii, with an I− thallus, a tomentose hymenial disc, and a chemistry with fatty acids only. Phylogenetic analyses using nuLSU and RPB2 sequences reveal the placement of Fulvophyton sorediatum, Llimonaea occulta, L. sorediata and Sparria caboverdensis in the family Opegraphaceae. The genus Llimonaea is recovered as paraphyletic, with L. flexuosa being placed as sister species to a lineage including the genera Ingaderia and Paraingaderia. In consequence, an enlarged concept of the genus Ingaderia is proposed, resulting in the transfer of F. sorediatum, L. flexuosa, L. occulta, L. sorediata and Paraingaderia placodioidea to Ingaderia.

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Copyright © The Author(s), 2023. Published by Cambridge University Press on behalf of the British Lichen Society

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