Revisiting the Lepetodrilus elevatus species complex (Vetigastropoda: Lepetodrilidae), using samples from the Galápagos and Guaymas hydrothermal vent systems

Type Article
Date 2019-02
Language English
Author(s) Matabos MarjolaineORCID1, Jollivet Didier2
Affiliation(s) 1 : IFREMER, Centre de Bretagne, REM/EEP, Laboratoire Environnement Profond, Plouzané, France
2 : Sorbonne Université, UPMC Univ. Paris 06, CNRS UMR 7144, Adaptation et Diversité en Milieu Marin, Equipe ABICE, Station Biologique de Roscoff, Roscoff, France
Source Journal Of Molluscan Studies (0260-1230) (Oxford University Press (OUP)), 2019-02 , Vol. 85 , N. 1 , P. 154-165
DOI 10.1093/mollus/eyy061
WOS© Times Cited 2
Abstract

The current distribution ranges of vent species result from the complex tectonic history of oceanic ridges. A growing number of DNA barcode studies report the presence of cryptic species across geological discontinuities that offset ridge systems and have gradually helped to draw a more precise picture of the historical migration pathways of vent fauna. We reexamined the phylogeny of species within the Lepetodrilus elevatus complex along the East Pacific Rise (EPR) ridge system in the light of new samples from the Galápagos Rift and the Guaymas Basin. Our analyses of mitochondrial cytochrome c oxidase subunit I gene sequences, coupled with morphological data, highlight the occurrence of a distinct lineage along the Galápagos Rift and offer new insight into the current distribution range of this species complex. Due to the absence of clear morphological diagnostic criteria and the potential overlap of these lineages at key locations, we recommend reassigning the taxon L. galriftensis to the subspecies level and maintaining the name L. elevatus for all clades along the EPR/Galápagos Rift system.

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