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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Whole-genome analyses converge to support the Hemirotifera hypothesis within Syndermata (Gnathifera)
Author(s): Vasilikopoulos, Alexandros
Herlyn, Holger
Fontaneto, Diego
Wilson, Christopher Gordon
Nowell, Reuben William
Flot, Jean-François
Barraclough, Timothy Giles
Van Doninck, Karine
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Keywords: Phylogenomics
Outgroup selection
Systematic error
Issue Date: 18-Jan-2024
Date Deposited: 17-Apr-2024
Citation: Vasilikopoulos A, Herlyn H, Fontaneto D, Wilson CG, Nowell RW, Flot J, Barraclough TG & Van Doninck K (2024) Whole-genome analyses converge to support the Hemirotifera hypothesis within Syndermata (Gnathifera). <i>Hydrobiologia</i>.
Abstract: The clade Syndermata includes the endoparasitic Acanthocephala, the epibiotic Seisonidea, and the free-living Bdelloidea and Monogononta. The phylogeny of Syndermata is highly debated, hindering the understanding of the evolution of morphological features, reproductive modes, and lifestyles within the group. Here, we use publicly available whole-genome data to re-evaluate syndermatan phylogeny and assess the credibility of alternative hypotheses, using a new combination of phylogenomic methods. We found that the Hemirotifera and Pararotatoria hypotheses were recovered under combinations of datasets and methods with reduced possibility of systematic error in concatenation-based analyses. In contrast, the Seisonidea-sister and Lemniscea hypotheses were recovered under dataset combinations with increased possibility of systematic error. Hemirotifera was further supported by whole-genome microsynteny analyses and species-tree methods that use multi-copy orthogroups after removing distantly related outgroups. Pararotatoria was only partially supported by microsynteny-based phylogenomic reconstructions. Hence, Hemirotifera and partially Pararotatoria were supported by independent phylogenetic methods and data-evaluation approaches. These two hypotheses have important implications for the evolution of syndermatan morphological features, such as the gradual reduction of locomotory ciliation from the common ancestor of Syndermata in the stem lineage of Pararotatoria. Our study illustrates the importance of combining various types of evidence to resolve difficult phylogenetic questions.
DOI Link: 10.1007/s10750-023-05451-9
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Notes: Output Status: Forthcoming/Available Online
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