Postglacial recolonization and Holocene diversiﬁcation of Crocidura suaveolens (Mammalia, Soricidae) on the north-western fringe of the European continent Juan Rofes a, * , Thomas Cucchi a , Pauline Hanot a , Jeremy Herman b , Pierre Stephan c , Sophie Cersoy d , Ivan Hor  a  cek e , Elizabeth Kerr a, f , Kate Allberry b, g , Silvia Valenzuela h , Antoine Zazzo a , Rapha € el Cornette i , Anne Tresset a a Arch eozoologie, Arch eobotanique: Soci et es, pratiques et environnements (UMR 7209), Sorbonne Universit es, Mus eum national d’Histoire naturelle, CNRS, CP56, 55 rue Buffon, 75005, Paris, France b National Museums of Scotland, Chambers Street, Edinburgh, EH1 1JF, UK c LETG laboratoire, UMR 6554 CNRS, Universit e de Bretagne Occidentale, Institut Universitaire Europ een de la Mer, Rue Dumont d’Urville, Plouzan e, 29280, France d Centre de Recherche sur la Conservation (CRC, USR 3224), Sorbonne Universit es, Mus eum national d'Histoire naturelle, Minist ere de la Culture et de la Communication, CNRS, CP21, 36 rue Geoffroy Saint-Hilaire, 75005, Paris, France e Department of Zoology, Charles University in Prague, Faculty of Science, Vini cn a 7, 128 43 Praha 2, Czech Republic f D epartement d’Ecologie et de Gestion de la Biodiversit e (UMR 7179), Sorbonne Universit es, Mus eum national d’Histoire naturelle, CNRS, 55 rue Buffon, 75005, Paris, France g The Durrell Institute of Conservation and Ecology (DICE), School of Anthropology and Conservation, Marlowe Building, The University of Kent, Canterbury, Kent, CT2 7NR, UK h Consejo Superior de Investigaciones Cientíﬁcas - Instituci o Mil a i Fontanals, C/ Egipcíaques 1, 08001, Barcelona, Spain i UMR 7205 ‘Institut de Syst ematique, Evolution, Biodiversit e’ (CNRS, MNHN, UPMC, EPHE), Sorbonne Universit es, Mus eum national d’Histoire naturelle, 45 rue Buffon, 75005, Paris, France article info Article history: Received 31 October 2017 Received in revised form 23 March 2018 Accepted 20 April 2018 Available online 5 May 2018 Keywords: Holocene Paleogeography Europe Data analysis Geometric morphometrics Mandible Island rule Shape divergence Eco-geographical constraints abstract Phenotypic variation was characterized in 187 modern and archaeological specimens of the lesser white- toothed shrew (Crocidura suaveolens), obtained from both insular and continental European locations. Geometric morphometric methods were used to quantify variation in size and shape of the mandible. The phenotypic distance between populations, and the inﬂuence of several eco-geographical factors on the size and shape of the mandible in island populations, were assessed. Based on mandible shape divergence, the populations of C. suaveolens were clustered into continental, insular Atlantic and insular Mediterranean groups. Archaeological specimens from Mol ene Island, more than 3400 years old, display a mandible shape signal closer to that of the continental population than those of modern island pop- ulations. Conversely, the continental shape signals of the modern populations from H€ oedic and Sark suggest that these are relatively recent anthropogenic introductions. The populations of C. suaveolens from both the Atlantic and Mediterranean islands (except for Rouzic and Cyprus) show a signiﬁcant increase in mandible size, compared to those from continental Europe. Signiﬁcant phenotypic differences support the indigenous condition of C. suaveolens on most of the Atlantic islands, suggesting that the species arrived there before the separation of the Scilly Isles and Ushant from the continent due to the post-glacial rise in sea level. This provides an ante quem for its colonization of the north-western fringe of continental Europe, notwithstanding its absence from the region in the present day. © 2018 Elsevier Ltd. All rights reserved. * Corresponding author. E-mail addresses: juan.rofes@mnhn.fr (J. Rofes), thomas.cucchi@mnhn.fr (T. Cucchi), pauline.hanot@mnhn.fr (P. Hanot), J.Herman@nms.ac.uk (J. Herman), pierre.stephan@ univ-brest.fr (P. Stephan), sophie.cersoy@mnhn.fr (S. Cersoy), ivan.horacek@natur.cuni.cz (I. Hor a cek), elizabeth.kerr@mnhn.fr (E. Kerr), kpa9@kent.ac.uk (K. Allberry), svalenzuela@imf.csic.es (S. Valenzuela), antoine.zazzo@mnhn.fr (A. Zazzo), raphael.cornette@mnhn.fr (R. Cornette), anne.tresset@mnhn.fr (A. Tresset). Contents lists available at ScienceDirect Quaternary Science Reviews journal homepage: www.elsevier.com/locate/quascirev https://doi.org/10.1016/j.quascirev.2018.04.016 0277-3791/© 2018 Elsevier Ltd. All rights reserved. Quaternary Science Reviews 190 (2018) 1e10