title: Genetic and morphological heterogeneity among populations of Eurytemora affinis (Crustacea: Copepoda: Temoridae) in European waters.
abstract: Our understanding of the systematics of the Eurytemora affinis complex developed at a fast pace over the last decades. Formerly considered as a complex of cryptic species, it is now believed to include three valid species: E. affinis, Eurytemora carolleeae, and Eurytemora caspica. American and European representatives have been studied in detail with respect to fine-scale geographic distribution, levels of genetic subdivision, evolutionary and demographic histories. Morphological components have been less explored. In this study, an analysis of the phylogeny and morphology of E. affinis was done, with a special focus on European populations. A total of 447 individuals of E. affinis from Europe were analyzed with genetic tools and 170 individuals according to morphological criteria. Common and new morphological and genetic features were analyzed. For this, we used ML and Bayesian methods to analyze the bar coding mt-DNA gene cytochrome c oxidase I subunit. Both genetic and morphological analyses showed high heterogeneities among the E. affinis populations from Europe. As a result, three local populations of E. affinis in Western Europe, including the European part of Russia, were established. Their genetic and morphological heterogeneity corresponded to the subspecies level.
authors.affiliation: Zoological Institute of RAS, Saint Petersburg, Russia. Electronic address: Susikh1@mail.ru.
authors.forename: Natalia
authors.initials: N
authors.lastname: Sukhikh
authors.affiliation: Université de Lille, CNRS, ULCO, UMR 8187, Laboratoire d'océanologie et de géosciences (LOG), 62930 Wimereux, France.
authors.forename: Anissa
authors.initials: A
authors.lastname: Souissi
authors.affiliation: Université de Lille, CNRS, ULCO, UMR 8187, Laboratoire d'océanologie et de géosciences (LOG), 62930 Wimereux, France.
authors.forename: Sami
authors.initials: S
authors.lastname: Souissi
authors.affiliation: Institut des sciences de la mer de Rimouski, Québec-Océan, Université du Québec à Rimouski, 310, allée des Ursulines, Rimouski, QC G5L 3A1, Canada.
authors.forename: Gesche
authors.initials: G
authors.lastname: Winkler
authors.affiliation: Université Lille-1 (Sciences et Technologies), UMR CNRS 8016, UFR de biologie, 59655 Villeneuve-d'Ascq cedex, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Castric
authors.affiliation: Université Lille-1 (Sciences et Technologies), UMR CNRS 8016, UFR de biologie, 59655 Villeneuve-d'Ascq cedex, France.
authors.forename: Anne-Catherine
authors.initials: AC
authors.lastname: Holl
authors.affiliation: Zoological Institute of RAS, Saint Petersburg, Russia.
authors.forename: Victor
authors.initials: V
authors.lastname: Alekseev
mesh_terms: D000818:Animals; D005075:Biological Evolution; D033342:Copepoda / Q000033:anatomy & histology* / Q000145:classification / Q000235:genetics*; D003576:Electron Transport Complex IV / Q000235:genetics; D005060:Europe; D014644:Genetic Variation; D005843:Geography; D006239:Haplotypes; D010802:Phylogeny; D013045:Species Specificity; D014867:Water
chemical_list: D014867:Water; D003576:Electron Transport Complex IV
keywords: Copepod systematics; Eurytemora; Morphometrics; Morphométrie; Phylogenetics; Phylogénie; Systématique de copépodes