To analyse phylogenetic discordance, we applied the Quartet Sampling (QS) method [48], which aims to identify the lack of branch support due to low phylogenetic information, discordance due to lineage sorting or introgression, and misplaced or erroneous taxa (rogue taxa). Details on the analysis and interpretation of scores are provided in Additional file 1, Additional file 2: Table S12, and Additional file 9.
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