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Phylogenomic analyses of a Mediterranean earthworm family (Annelida: Hormogastridae)

Novo Rodriguez, Marta, Fernández, Rosa, Andrade, Sónia C.S., Marchán, Daniel F., Cunha, Luis and Díaz Cosín, Darío J. 2016. Phylogenomic analyses of a Mediterranean earthworm family (Annelida: Hormogastridae). Molecular Phylogenetics and Evolution 94 (B) , pp. 473-478. 10.1016/j.ympev.2015.10.026

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Earthworm taxonomy and evolutionary biology remain a challenge because of their scarce distinct morphological characters of taxonomic value, the morphological convergence by adaptation to the uniformity of the soil where they inhabit, and their high plasticity when challenged with stressful or new environmental conditions. Here we present a phylogenomic study of the family Hormogastridae, representing also the first piece of work of this type within earthworms. We included seven transcriptomes of the group representing the main lineages as previously-described, analysed in a final matrix that includes twelve earthworms and eleven outgroups. While there is a high degree of gene conflict in the generated trees that obscure some of the internal relationships, the origin of the family is well resolved: the hormogastrid Hemigastrodrilus appears as the most ancestral group, followed by the ailoscolecid Ailoscolex, therefore rejecting the validity of the family Ailoscolecidae. Our results place the origin of hormogastrids in Southern France, as previously hypothesised.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Additional Information: Available online 31 October 2015
Publisher: Elsevier
ISSN: 1055-7903
Date of Acceptance: 24 October 2015
Last Modified: 31 Jan 2020 03:51

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