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. 2019 Apr 9;9:5841. doi: 10.1038/s41598-019-42310-x

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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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Maximum Likelihood tree for chelid mitogenomes, including historical type specimens using a 16,289-bp-long alignment. For historical type specimens, the original name combinations are shown in bold. Numbers at nodes are bootstrap values and posterior probabilities for a Bayesian tree of the same topology. Asterisks indicate maximum support under both methods. Quotation marks for a GenBank sequence assigned to Emydura subglobosa (KC692462) indicate questionable taxonomic allocation. Lectotype and paralectotype of Hydraspis victoriae were previously erroneously identified. The species description was based only on the putative paralectotype, which is therefore the name-bearing holotype (see Discussion). Snake-necked species of Chelodina in red, long-necked species in black. Icons are derived from photos of Chelodina steindachneri (long-necked Chelodina), C. burrungandjii (snake-necked Chelodina), and Elusor macrurus (short-necked species; from top to bottom). Drawings: U. Fritz. On the right are for Australasian taxa the currently accepted genera shown⁹.