Alda P. auteur aut IRD Lounnas Manon auteur aut IRD Vazquez A. A. auteur aut IRD Ayaqui R. auteur aut IRD Calvopina M. auteur aut IRD Celi-Erazo M. auteur aut IRD Dillon R. T. auteur aut IRD Ramirez L. C. G. auteur aut IRD Loker E. S. auteur aut IRD Muzzio-Aroca J. auteur aut IRD Narvaez A. O. auteur aut IRD Noya O. auteur aut IRD Pereira A. E. auteur aut IRD Robles L. M. auteur aut IRD Rodriguez-Hidalgo R. auteur aut IRD Uribe N. auteur aut IRD David P. auteur aut IRD Jarne P. auteur aut IRD Pointier J. P. auteur aut IRD Hurtrez-Bousses S. auteur aut IRD text journalArticle eng text/pdf born digital access Cryptic species can present a significant challenge to the application of systematic and biogeographic principles, especially if they are invasive or transmit parasites or pathogens. Detecting cryptic species requires a pluralistic approach in which molecular markers facilitate the detection of coherent taxonomic units that can then be analyzed using various traits (e.g., internal morphology) and crosses. In asexual or self-fertilizing species, the latter criteria are of limited use. We studied a group of cryptic freshwater snails (genus Galba) from the family Lymnaeidae that have invaded almost all continents, reproducing mainly by self-fertilization and transmitting liver flukes to humans and livestock. We aim to clarify the systematics, distribution, and phylogeny of these species with an integrative approach that includes morphology, molecular markers, wide-scale sampling across America, and data retrieved from GenBank (to include Old World samples). Our phylogenetic analysis suggests that the genus Galba originated ca. 22 Myr ago and today comprises six species or species complexes. Four of them show an elongated-shell cryptic phenotype and exhibit wide variation in their genetic diversity, geographic distribution, and invasiveness. The remaining two species have more geographically restricted distributions and exhibit a globose-shell cryptic phenotype, most likely phylogenetically derived from the elongated one. We emphasize that no Galba species should be identified without molecular markers. We also discuss several hypotheses that can explain the origin of cryptic species in Galba, such as convergence and morphological stasis. specialized Phylogenetics America Lymnaeidae Vector snails Biological invasions Self-fertilization ARGENTINE CANADA COLOMBIE CUBA EQUATEUR GUADELOUPE MARTINIQUE PERU VENEZUELA ETATS UNIS 034 080 157 107035 [12 p.] 2021 1055-7903 https://www.documentation.ird.fr/hor/fdi:010081024 10.1016/j.ympev.2020.107035 1055-7903 [F B010081024] https://www.documentation.ird.fr/hor/fdi:010081024 https://www.documentation.ird.fr/intranet/publi/2021/03/010081024.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2021-04-01 2025-02-24 fdi:010081024 fre