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Type: Journal article
Title: Extreme genetic diversity among springtails (Collembola) in subterranean calcretes of arid Australia
Author: Guzik, M.T.
Stevens, M.I.
Cooper, S.J.B.
Humphreys, W.F.
Austin, A.D.
Citation: Genome, 2020; 64(3):1-15
Publisher: Canadian Science Publishing
Issue Date: 2020
ISSN: 0831-2796
Editor: Hogg, I.
Statement of
Michelle T. Guzik, Mark I. Stevens, Steven J.B. Cooper, William F. Humphreys and Andrew D. Austin
Abstract: The subterranean islands hypothesis for calcretes of the Yilgarn region in Western Australia applies to many stygobitic (subterranean-aquatic) species that are "trapped" evolutionarily within isolated aquifers due to their aquatic lifestyles. In contrast, little is known about the distribution of terrestrial-subterranean invertebrates associated with the calcretes. We used subterranean Collembola from the Yilgarn calcretes to test the hypothesis that troglobitic species, those inhabiting the subterranean unsaturated (non-aquatic) zone of calcretes, are also restricted in their distribution and represent reciprocally monophyletic and endemic lineages. We used the barcoding fragment of the mtDNA cytochrome c oxidase subunit 1 (COI) gene from 183 individuals to reconstruct the phylogenetic history of the genus Pseudosinella Schäffer (Collembola, Lepidocyrtidae) from 10 calcretes in the Yilgarn. These calcretes represent less than 5% of the total possible calcretes in this region, yet we show that their diversity for subterranean Collembola comprises a minimum of 25 new species. Regionally, multiple levels of diversity exist in Pseudosinella, indicative of a complex evolutionary history for this genus in the Yilgarn. These species have probably been impacted by climatic oscillations, facilitating their dispersal across the landscape. The results represent a small proportion of the undiscovered diversity in Australia's arid zone.
Keywords: COI
DNA barcoding
codage à barres de l’ADN
définition des espèces
hypothèse des îlots souterrains
species delimitation
subterranean island hypothesis
Description: Publication: Genome 18 June 2020
Rights: Copyright remains with the author(s) or their institution(s). Permission for reuse (free in most cases) can be obtained from RightsLink.
DOI: 10.1139/gen-2019-0199
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Earth and Environmental Sciences publications

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