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Unravelling the phylogeny, cryptic diversity and morphological evolution of Diptilomiopus mites (Acari: Eriophyoidea)

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Abstract

The Eriophyoidea, notable for specific morphological characters (four-legged mites) and gall-formation in host plants (gall mites), is one of the most species-rich superfamilies of Acari. Monophyly of the superfamily Eriophyoidea is accepted by all acarologists; however, monophyly of most genera has not been evaluated in a molecular phylogenetic network. Furthermore, most eriophyoid mites, especially species in the genus Diptilomiopus, are morphologically similar, challenging their identification. Here we test the phylogeny and cryptic diversity of Diptilomiopus species using fragments of two mitochondrial (COI and 12S) and two nuclear (18S and 28S) genes. Our results revealed the monophyly of Diptilomiopus. Sequence distance, barcode gap, and species delimitation analyses of the COI gene allowed us to resolve cryptic diversity of Diptilomiopus species. Additionally, we supposed that characteristics of genu fused with femur on both legs and seta ft′ absent on leg II evolved only once within Diptilomiopus, which are potential morphological synapomorphies. In contrast, characteristics of both setae ft′ and ft″ divided into a short branch and a long branch were supposed evolving multiple times independently. Our findings contribute to the understanding of phylogeny and morphological evolution of Diptilomiopus species and provide a DNA-based approach for species delimitation of Diptilomiopus mites.

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Acknowledgements

We would like to thank Mr. Jimmy Chew (Borneo Jungle Girl Camp, Keningau, Sabah, Malaysia) for kindly collecting mite specimens in Sabah, Malaysia. This research was funded by the National Natural Science Foundation of China (31970437).

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Correspondence to Xiao-Feng Xue.

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Electronic Supplementary Material

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10493_2019_443_MOESM1_ESM.pdf

Supplementary material 1 Phylogenetic trees inferred from nucleotide sequences of 18S gene using maximum likelihood method. Node numbers indicate maximum likelihood bootstrap proportion (BSP) (PDF 166 kb)

10493_2019_443_MOESM2_ESM.pdf

Supplementary material 2 Phylogenetic trees inferred from nucleotide sequences of 18S gene using Bayesian method. Node numbers indicate Bayesian posterior probabilities (BPP) (PDF 159 kb)

10493_2019_443_MOESM3_ESM.pdf

Supplementary material 3 Phylogenetic trees inferred from nucleotide sequences of two mitochondrial (COI and 12S) and two nuclear (18S and 28S) gene fragments using maximum likelihood method. Node numbers indicate maximum likelihood bootstrap proportion (BSP) (135 kb)

10493_2019_443_MOESM4_ESM.pdf

Supplementary material 4 Phylogenetic trees inferred from nucleotide sequences of two mitochondrial (COI and 12S) and two nuclear (18S and 28S) gene fragments using Bayesian method. Node numbers indicate Bayesian posterior probabilities (BPP) (134 kb)

10493_2019_443_MOESM5_ESM.pdf

Supplementary material 5 Phylogenetic trees of Diptilomiopus species inferred from nucleotide sequences of (A) COI (no partitioned), (B) COI (partitioned by three codons), (C) 18S and (D) 28S using Bayesian method. Node numbers (black) indicate Bayesian posterior probabilities (BPP). Branch numbers (red) indicate support values inferred by bPTP. Blue bars indicate delimitated species by analyses of GYMC and bPTP (440 kb)

Supplementary material 6 (DOCX 40 kb)

Supplementary material 7 (DOCX 20 kb)

Supplementary material 8 Pairwise genetic distance of Diptilomiopus species in COI, 18S and 28S gene. (XLSX 40 kb)

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Liu, Q., Yuan, YM., Lai, Y. et al. Unravelling the phylogeny, cryptic diversity and morphological evolution of Diptilomiopus mites (Acari: Eriophyoidea). Exp Appl Acarol 79, 323–344 (2019). https://doi.org/10.1007/s10493-019-00443-8

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  • DOI: https://doi.org/10.1007/s10493-019-00443-8

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