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Molecular and morphological divergence in a stygobiont gastropod lineage (Truncatelloidea,Moitessieriidae, Paladilhiopsis) within an isolated karstic area in the Mecsek Mountains (Hungary)
Authors:Dorottya Angyal  Gergely Balázs  Virág Krízsik  Gábor Herczeg  Zoltán Fehér
Institution:1. Department of Zoology, Hungarian Natural History Museum, Budapest, Hungary;2. Department of Systematic Zoology and Ecology, E?tv?s Loránd University, Budapest, Hungary;3. Laboratory of Molecular Taxonomy, Hungarian Natural History Museum, Budapest, Hungary;4. Central Research Laboratories, Zoology Department, Natural History Museum, Vienna, Austria
Abstract:Truncatelloid gastropods are one of the most species‐rich subterranean invertebrate groups. Their current taxonomy is based on morphological characters. However, this is not a comprehensive approach and does not take into account the degree of phylogenetic divergence between stygobiont populations inhabiting hydrologically isolated but geographically close caves. We studied two Paladilhiopsis populations of a small and isolated karstic area (Mecsek Mountains, Hungary) with two hydrologically separated cave systems, investigating morphological (shell morphometrics) and genetic (COI, 16S) divergence together. The populations differed both morphologically and genetically: we found strong divergence in the relative width of the shell (best described by the variable “shell angle”) and a 6.4% divergence in COI. This provides strong support for the presence of two distinct taxa; however, it is still doubtful whether they differ at the species or the subspecies level. In one of the caves, we found representatives of both haplotypes (and phenotypes), which can be explained by secondary contact after an allopatric divergence.
Keywords:locality‐haplotype mismatch  Moitessieriidae  phylogeny  shell morphometry  subterranean
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