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. 2019 Dec 27;9:19856. doi: 10.1038/s41598-019-56321-1

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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 images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Phylogenetic tree based on EF_1-a + RPB₁ + RPB₂. Note: The tree covered 138 sequences (62 phylospecies of true morels, Verpa sp) were constructed by maximum-likelihood (ML) method. Bootstrap values ≥50% were shown on branches. Collections of Morchella spp. species, inclusive of a Verpa bohemica from Qinling Mt. were marked with red dots. Phylogenetic species were assigned according to^12,13,16,17. Verpa sp. was used as outgroup.