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Cryptic diversity of the 'cosmopolitan' harpacticoid copepod Nannopus palustris: genetic and morphological evidences

(2012) MOLECULAR ECOLOGY. 21(21). p.5336-5347
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Abstract
Nannopus palustris Brady, 1880is a free-living widely distributed harpacticoid copepod, which has been formerly assumed to be a single, cosmopolitan but highly variable species. We compared several geographically distant N.palustris populations in terms of their morphology and genetics. Populations from the White Sea (WS), the North Sea (NS), the Black Sea (BS) and two sympatric morphs from South Carolina, USA (SC notched and SC straight morphs), were considered. The NS, BS and to a lesser extent SC notched specimens were morphologically similar and partly coincided to the canonical description of the species. By contrast, WS population showed remarkable anatomical and morphometric peculiarities that correspond to some earlier descriptions. Genetic analyses of mitochondrial (cytochrome b) and nuclear (28S rDNA) genes demonstrated the significant distinctness among WS, both SC and (NS+BS) populations, the latter two being genetically indistinguishable. Concordance between mitochondrial and nuclear gene trees and morphological data supports that N.palustris is in fact composed of several pseudo-sibling species, which are genetically and morphologically divergent. Neither correlation between genetic divergence and geographical distance nor significant intrapopulation diversity was found for these species. Taxonomic status, distribution and phylogenetic relationships of the species within the Nannopus genus need to be reconsidered. A further subdivision of species complexes might have important implications for the analysis of biodiversity of benthic copepods and consequently for the interpretation of their (species-specific) ecological function.
Keywords
genetic diversity, cryptic species, Harpacticoida, meiofauna, morphology, Nannopus palustris, TIGRIOPUS-CALIFORNICUS, DNA, DIFFERENTIATION, PHYLOGEOGRAPHY, SOUTHEASTERN, POPULATIONS, CRUSTACEA, LINEAGES, NEMATODA, DISTANCE

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Chicago
Garlitska, Lesya, Tatyana Neretina, Dimitry Schepetov, Nikolai Mugue, Marleen De Troch, Jeffrey G Baguley, and Andrey Azovsky. 2012. “Cryptic Diversity of the ‘Cosmopolitan’ Harpacticoid Copepod Nannopus Palustris: Genetic and Morphological Evidences.” Molecular Ecology 21 (21): 5336–5347.
APA
Garlitska, L., Neretina, T., Schepetov, D., Mugue, N., De Troch, M., Baguley, J. G., & Azovsky, A. (2012). Cryptic diversity of the “cosmopolitan” harpacticoid copepod Nannopus palustris: genetic and morphological evidences. MOLECULAR ECOLOGY, 21(21), 5336–5347.
Vancouver
1.
Garlitska L, Neretina T, Schepetov D, Mugue N, De Troch M, Baguley JG, et al. Cryptic diversity of the “cosmopolitan” harpacticoid copepod Nannopus palustris: genetic and morphological evidences. MOLECULAR ECOLOGY. 2012;21(21):5336–47.
MLA
Garlitska, Lesya, Tatyana Neretina, Dimitry Schepetov, et al. “Cryptic Diversity of the ‘Cosmopolitan’ Harpacticoid Copepod Nannopus Palustris: Genetic and Morphological Evidences.” MOLECULAR ECOLOGY 21.21 (2012): 5336–5347. Print.
@article{3068998,
  abstract     = {Nannopus palustris Brady, 1880is a free-living widely distributed harpacticoid copepod, which has been formerly assumed to be a single, cosmopolitan but highly variable species. We compared several geographically distant N.palustris populations in terms of their morphology and genetics. Populations from the White Sea (WS), the North Sea (NS), the Black Sea (BS) and two sympatric morphs from South Carolina, USA (SC notched and SC straight morphs), were considered. The NS, BS and to a lesser extent SC notched specimens were morphologically similar and partly coincided to the canonical description of the species. By contrast, WS population showed remarkable anatomical and morphometric peculiarities that correspond to some earlier descriptions. Genetic analyses of mitochondrial (cytochrome b) and nuclear (28S rDNA) genes demonstrated the significant distinctness among WS, both SC and (NS+BS) populations, the latter two being genetically indistinguishable. Concordance between mitochondrial and nuclear gene trees and morphological data supports that N.palustris is in fact composed of several pseudo-sibling species, which are genetically and morphologically divergent. Neither correlation between genetic divergence and geographical distance nor significant intrapopulation diversity was found for these species. Taxonomic status, distribution and phylogenetic relationships of the species within the Nannopus genus need to be reconsidered. A further subdivision of species complexes might have important implications for the analysis of biodiversity of benthic copepods and consequently for the interpretation of their (species-specific) ecological function.},
  author       = {Garlitska, Lesya and Neretina, Tatyana and Schepetov, Dimitry and Mugue, Nikolai and De Troch, Marleen and Baguley, Jeffrey G and Azovsky, Andrey},
  issn         = {0962-1083},
  journal      = {MOLECULAR ECOLOGY},
  language     = {eng},
  number       = {21},
  pages        = {5336--5347},
  title        = {Cryptic diversity of the 'cosmopolitan' harpacticoid copepod Nannopus palustris: genetic and morphological evidences},
  url          = {http://dx.doi.org/10.1111/mec.12016},
  volume       = {21},
  year         = {2012},
}

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