Integrative phylogenetic, phylogeographic and morphological characterisation of the Unio crassus species complex reveals cryptic diversity with important conservation implications
Lopes-Lima, M., Geist, J., Egg, S., Beran, L., Bikashvili, A., Van Bocxlaer, B., Bogan, AE., Bolotov, IN., Chelpanovskaya, OA., Douda, K., Fernandes, V., Gomes-dos-Santos, A., Gonçalves, DV., Gürlek, ME., Johnson, NA., Karaouzas, I., Kebapçı, Ü., Kondakov, AV., Kuehn, R., . . . Froufe, E. (2024). Integrative phylogenetic, phylogeographic and morphological characterisation of the Unio crassus species complex reveals cryptic diversity with important conservation implications. Molecular Phylogenetics and Evolution, 195, Article 108046. https://doi.org/10.1016/j.ympev.2024.108046
Julkaistu sarjassa
Molecular Phylogenetics and EvolutionPäivämäärä
2024Tekijänoikeudet
© 2024 the Authors
The global decline of freshwater mussels and their crucial ecological services highlight the need to understand their phylogeny, phylogeography and patterns of genetic diversity to guide conservation efforts. Such knowledge is urgently needed for Unio crassus, a highly imperilled species originally widespread throughout Europe and southwest Asia. Recent studies have resurrected several species from synonymy based on mitochondrial data, revealing U. crassus to be a complex of cryptic species. To address long-standing taxonomic uncertainties hindering effective conservation, we integrate morphometric, phylogenetic, and phylogeographic analyses to examine species diversity within the U. crassus complex across its entire range. Phylogenetic analyses were performed using cytochrome c oxidase subunit I (815 specimens from 182 populations) and, for selected specimens, whole mitogenome sequences and Anchored Hybrid Enrichment (AHE) data on ∼600 nuclear loci. Mito-nuclear discordance was detected, consistent with mitochondrial DNA gene flow between some species during the Pliocene and Pleistocene. Fossil-calibrated phylogenies based on AHE data support a Mediterranean origin for the U. crassus complex in the Early Miocene. The results of our integrative approach support 12 species in the group: the previously recognised Unio bruguierianus, Unio carneus, Unio crassus, Unio damascensis, Unio ionicus, Unio sesirmensis, and Unio tumidiformis, and the reinstatement of five nominal taxa: Unio desectus stat. rev., Unio gontierii stat. rev., Unio mardinensis stat. rev., Unio nanus stat. rev., and Unio vicarius stat. rev. Morphometric analyses of shell contours reveal important morphospace overlaps among these species, highlighting cryptic, but geographically structured, diversity. The distribution, taxonomy, phylogeography, and conservation of each species are succinctly described.
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ElsevierISSN Hae Julkaisufoorumista
1055-7903Asiasanat
Julkaisu tutkimustietojärjestelmässä
https://converis.jyu.fi/converis/portal/detail/Publication/207429275
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This publication is based upon work from COST Action CA18239: CONFREMU - Conservation of freshwater mussels: a pan-European approach, supported by COST (European Cooperation in Science and Technology), including STSMs, the interaction of the authors and the writing of the paper. This work was supported by the project ConBiomics: The Missing Approach for the Conservation of Freshwater Bivalves Project No. NORTE-01-0145- FEDER-030286, co-financed by COMPETE 2020, Portugal 2020 and the European Union through the ERDF, and by FCT - Fundação para a Ciência e a Tecnologia, through national funds, strategic funding UIDB/04423/2020 and UIDP/04423/2020 provided by FCT. FCT also supported DVG (2020.03848.CEECIND) and MLL (2020.03608.CEECIND). INB, AVK and IVV were supported by the Russian Science Foundation under grants (19-14-00066-P), (21-17-00126) and (21-74-10130) respectively. BVB acknowledges the bioinformatics platform of UMR 8198 for the computing resources to perform time-calibrated phylogenetic analyses; this platform is in part funded by CPER research project CLIMIBIO through the French Ministère de l’Enseignement Supérieur et de la Recherche, the Agence Nationale de la Recherche, the European Fund for Regional Development (FEDER) and the region Hauts-de-France (HdF). Support to KD came from the Czech Science Foundation (19–05510S). TT and MT were supported by the National Science Fund of Bulgaria under the project ‘Conservation of freshwater mussels on the Balkan Peninsula’ (KP-06-COST-9/20.07.2022).![showless](/themes/JYX2//images/showless.png)
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