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Two new tardigrade genera from New Zealand?s Southern Alp glaciers display morphological stasis and parallel evolution

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F23%3A96961" target="_blank" >RIV/60460709:41320/23:96961 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1016/j.ympev.2022.107634" target="_blank" >http://dx.doi.org/10.1016/j.ympev.2022.107634</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.ympev.2022.107634" target="_blank" >10.1016/j.ympev.2022.107634</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Two new tardigrade genera from New Zealand?s Southern Alp glaciers display morphological stasis and parallel evolution

  • Original language description

    Tardigrada is an invertebrate phylum that often constitutes a dominant micrometazoan group on glaciers worldwide. We investigated tardigrades residing in surface ice above the equilibrium line altitude (ELA) on three temperate glaciers of New Zealand's Southern Alps. Morphological, morphometric and multilocus DNA analyses (CO1, 18S rRNA, 28S rRNA, ITS-2) revealed two new genera comprising four species, of which two are formally described here: Kopakaius gen. nov. nicolae sp. nov. and Kararehius gen. nov. gregorii sp. nov. The former is represented by three genetically distinct phyletic lineages akin to species. According to CO1, Kopakaius gen. nov. nicolae sp. nov. inhabits Whataroa Glacier only while the remaining two Kopakaius species occur on Fox and Franz Joseph Glaciers, suggesting low dispersal capabilities. Although morphological characteristics of the new genera could indicate affinity with the subfamily Itaquasconinae, phylogenetic analysis placed them confidently in the subfamily Diphasconinae. Kopakaius gen. nov. lack placoids in the pharynx similar with some Ita-quasconinae, whereas dark pigmentation and claw shape aligns them with the glacier-obligate genus, Cryobiotus (subfamily Hypsibiinae), which is an example of parallel evolution. The second genus, Kararehius gen nov. could be classified as Adropion-like (subfamily Itaquasconinae), but differs greatly by genetics (placed in the subfamily Diphasconinae) as well as morphology (e.g., lack of septulum), exemplify deep stasis in Hypsibiidae. Our results suggest that glacier fragmentation during the Pleistocene triggered tardigrade speciation, making it a suitable model for studies on allopatric divergence in glacier meiofauna.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10602 - Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology

Result continuities

  • Project

  • Continuities

    S - Specificky vyzkum na vysokych skolach

Others

  • Publication year

    2023

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    MOLECULAR PHYLOGENETICS AND EVOLUTION

  • ISSN

    1055-7903

  • e-ISSN

    1055-7903

  • Volume of the periodical

    178

  • Issue of the periodical within the volume

    2023

  • Country of publishing house

    CZ - CZECH REPUBLIC

  • Number of pages

    14

  • Pages from-to

    1-14

  • UT code for WoS article

    000878499800005

  • EID of the result in the Scopus database

    2-s2.0-85140025320