01912nas a2200193 4500008004100000245018700041210006900228260001200297300001200309490000700321520121200328100002101540700001801561700001601579700003201595700002001627700001901647856005201666 2009 eng d00aMolecular barcoding and phylogeography of sexual and asexual freshwater planarians of the genus Dugesia in the Western Mediterranean (Platyhelminthes, Tricladida, Dugesiidae).0 aMolecular barcoding and phylogeography of sexual and asexual fre c09/2009 a835-8450 v523 a

Planarians of the genus Dugesia have a worldwide distribution with high species diversity in the Mediterranean area. In this area, populations with a triploid karyotype that reproduce by fissiparity are exceptionally frequent, outnumbering the sexual populations. This situation poses interesting questions, such as the age of these asexual lineages, whether they all belong to the same species or whether the triploidization event is recurrent, and what factors (climatic, geographical, historical...) explain the prevalence of these asexual forms. However, asexual populations cannot be assigned to a species due to the lack of copulatory apparatus - the main structure used in species identification. In this study, we have developed a DNA barcoding method, based on COI and ITS-1 sequences, which allows the assignment of the fissiparous forms to sexual species. At the same time, phylogenetic analysis from species of the western Mediterranean have unveiled the presence of species with highly differentiated populations alongside species with a wide distribution and almost no genetic variation. The roles of habitat instability, dispersal capacity and human activities are briefly discussed.

1 aLázaro, Eva, M.1 aSluys, Ronald1 aPala, Maria1 aStocchino, Giacinta, Angela1 aBaguñà, Jaume1 aRiutort, Marta uhttps://continenticola.myspecies.info/node/124100511nas a2200133 4500008004100000245010300041210006900144260001200213300001200225490000700237100003200244700002000276856008100296 2013 eng d00aOverview of life cycles in model species of the genus Dugesia (Platyhelminthes: Tricladida)0 aOverview of life cycles in model species of the genus iDugesiai  c08/2013 a319-3280 v801 aStocchino, Giacinta, Angela1 aManconi, Renata uhttp://www.tandfonline.com/doi/abs/10.1080/11250003.2013.822025#.UjmNhT9F9ws