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. 2020 Jan 6;20:2. doi: 10.1186/s12862-019-1571-4

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© The Author(s). 2020

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Representatives of the Rhizoplaca melanophthalma species complex. a., the crustose taxon R. novomexicana (field image, La Sal Mountains, Utah, USA); b., the umbilicate taxon R. melanophthalma sensu stricto (field image, La Sal Mountains, Utah, USA); and, c., the umbilicate taxon R. porteri (field image, Rich Co., Utah, USA)