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Phylogenetic position of Bopyroides hippolytes, with comments on the rearrangement of the mitochondrial genome in isopods (Isopoda: Epicaridea: Bopyridae)
Wu, R.; Guo, R.; Xi, Q.; Paulay, G.; An, J. (2022). Phylogenetic position of Bopyroides hippolytes, with comments on the rearrangement of the mitochondrial genome in isopods (Isopoda: Epicaridea: Bopyridae). BMC Genom. 23: 253. https://dx.doi.org/10.1186/s12864-022-08513-9
In: BMC Genomics. BioMed Central: London. e-ISSN 1471-2164, more
Peer reviewed article  

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Keywords
    Bopyroides hippolytes (Kröyer, 1838) [WoRMS]; Isopoda [WoRMS]
    Marine/Coastal
Author keywords
    Parasitic isopods; Phylogenetic relationship; Mitogenomes; Gene arrangement

Authors  Top 
  • Wu, R.
  • Guo, R.
  • Xi, Q.
  • Paulay, G., more
  • An, J.

Abstract

    Background

    Classification of parasitic bopyrids has traditionally been based on morphological characteristics, but phylogenetic relationships have remained elusive due to limited information provided by morphological data and tendency for loss of morphological features as a result of parasitic lifestyle. Subfamily Argeiinae was separated from Bopyrinae based on morphological evidence, although the assignment of all genera has not been phylogenetically evaluated. Bopyroides hippolytes has been traditionally classified in Bopyrinae, but divergent morphological characters make this assignment questionable. To investigate the relationship of bopyrines, we sequenced the complete mitochondrial genome of B. hippolytes and four mitochondrial genes of two other Bopyrinae.

    Results

    The phylogenetic trees based on separate and combined cox1and 18S sequence data recovered Bopyridae as robustly monophyletic, but Bopyrinae as polyphyletic. Bopyroides hippolytes was a close sister to Argeia pugettensis, type species to Argeiinae. Mitochondrial phylogenomics also suggested that B. hippolytes was close to Argeiinae. We also found a novel gene order in B. hippolytes compared to other isopods.

    Conclusions

    Bopyroides hippolytes should be excluded from the Bopyrinae and has a close affinity with Argeia pugettensis based on molecular and morphological data. The conserved syntenic blocks of mitochondrial gene order have distinctive characteristics at a subordinal level and may be helpful for understanding the higher taxonomic level relationships of Isopoda.


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