Ceriodaphnia (Cladocera: Daphniidae) in China: Lineage diversity, phylogeography and possible interspecific hybridization

Deng, Zhixiong, Yao, Yiyang, Blair, David, Hu, Wei, and Yin, Mingbo (2022) Ceriodaphnia (Cladocera: Daphniidae) in China: Lineage diversity, phylogeography and possible interspecific hybridization. Molecular Phylogenetics and Evolution, 175. 107586.

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Abstract

The distribution and species/lineage diversity of freshwater invertebrate zooplankton remains understudied in China. Here, we explored the species/lineage diversity and phylogeography of Ceriodaphnia species across China. The taxonomy of this genus is under-explored. Seven morphospecies of Ceriodaphnia (C. cornuta, C. laticaudata, C. megops, C. pulchella, C. quadrangula, C. rotunda and C. spinata) were identified across 45 of 422 water bodies examined. Rather little morphological variation was observed within any single morphospecies regardless of country of origin. Nevertheless, we recognized that some or all of these morphospecies might represent species complexes. To investigate this, phylogenetic relationships within and among these morphospecies were inves-tigated based on mitochondrial (partial cytochrome c oxidase subunit I gene) and nuclear (partial 28S rRNA gene) markers. The mitochondrial marker placed these populations in nine lineages corresponding to the mor-phospecies: C. laticaudata and C. pulchella were each represented by two lineages, suggesting that both are species complexes. The remaining five morphospecies were each represented by a single mtDNA lineage. Three of the nine mitochondrial lineages (belonging to C. pulchella, C. rotunda and C. megops) are newly reported and exhibited a restricted distribution within China. The nuclear-DNA phylogeny also recognized seven Ceriodaphnia taxa within China. We detected occasional mito-nuclear discordances in Ceriodaphnia taxa across China, sug-gesting interspecific introgression and hybridization. Our study contributes to an understanding of the species/ lineage diversity of Ceriodaphnia, a genus with understudied taxonomy.

Item ID: 75717
Item Type: Article (Research - C1)
ISSN: 1095-9513
Keywords: Ceriodaphnia, Biogeography, Phylogenetics, Mitonuclear discordance, Cryptic lineages, China
Copyright Information: © 2022 Elsevier Inc. All rights reserved.
Date Deposited: 10 Aug 2022 09:43
FoR Codes: 31 BIOLOGICAL SCIENCES > 3109 Zoology > 310913 Invertebrate biology @ 50%
31 BIOLOGICAL SCIENCES > 3104 Evolutionary biology > 310401 Animal systematics and taxonomy @ 50%
SEO Codes: 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280102 Expanding knowledge in the biological sciences @ 100%
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