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