Integrative taxonomy reveals Parakaliella harimensis (Pilsbry, 1901) as a distinct East Asian Euconulus species with deep genetic structure
| Autoři | |
|---|---|
| Rok publikování | 2026 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Molecular Phylogenetics and Evolution |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | https://doi.org/10.1016/j.ympev.2025.108460 |
| Doi | https://doi.org/10.1016/j.ympev.2025.108460 |
| Klíčová slova | Distribution; Integrative taxonomy; Land snails; New markers; Phylogeny; Stability |
| Popis | The remarkable phenotypic plasticity of land snail shells often results in convergent evolution, leading to frequent taxonomic misidentifications and non-monophyletic classifications. The taxonomy of the Holarctic micro land snails related to Euconulus fulvus has been particularly challenging to resolve. This study integrates mitochondrial and nuclear DNA phylogenetics, geometric morphometrics, and climate suitability modeling to clarify the phylogenetic and taxonomic status of an East Asian lineage within this group. We confirm that this lineage represents a distinct and previously misclassified species, Euconulus harimensis, which was formerly placed within the genus Parakaliella. While standard mtDNA and nDNA markers showed this evolutionary lineage as polyphyletic, two newly developed nuclear markers (ZN507 and TEP1) resolved the lineage, except for one individual, within a single robust clade of E. harimensis. Geometric morphometric analyses revealed significant differences in shell shape, which, along with unique shell microsculpture, further support its taxonomic separation. Although E. harimensis possesses the smallest distribution range of all related species, it exhibits the highest intraspecific genetic diversity. The models of suitable climatic conditions for both the present and the Last Glacial Maximum showed no major shifts, suggesting high climatic stability of the species range during the Pleistocene. This, along with other palaeobiogeographic factors, may have contributed to the unexpectedly high intraspecific genetic diversity of this species despite its limited range. Our findings provide new insights into the evolutionary processes that shape land snail inter- and intraspecific diversity, with implications for their taxonomy, which has often relied on shell morphology only. Additionally, phylogenetic analysis based on the new markers sheds novel light on the taxonomy and evolution of E. fulvus and E. alderi, highlighting the need for further taxonomic research |
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