@article {JZO:JZO609, title = {Morphological and biochemical variation in populations of Dugesia (G.) tigrina (Turbellaria, Tricladida, Paludicola) from the western Mediterranean: biogeographical and taxonomical implications}, journal = {Journal of Zoology}, volume = {218}, number = {4}, year = {1989}, pages = {609{\textendash}626}, publisher = {Blackwell Publishing Ltd}, abstract = {

Dugesia (Girardia) tigrina is a Nearctic freshwater triclad native to North America, now amply distributed in most European countries as the result of a reportedly unique introduction into north-west Europe early this century and its dispersal southwards and eastwards in the last decades. All European populations described so far are externally spotted, with a pigmented pharynx, and, apart from two sexual populations recently described in England, they are fissiparous. This uniformity contrasts with the variability reported in its native area, thus supporting the hypothesis of a single introduction. However, thorough morphological, karyological and biochemical comparative studies of European populations have never been properly done.We have undertaken such a study comparing 24 populations present in a restricted area of the western Mediterranean. The results show an unexpectedly ample variation in external and pharyngeal pigmentation patterns, the presence of sexually reproducing populations, and ample variation in their biochemical patterns as revealed by isoelectric-focusing. This is an indication that European Dugesia (G.) tigrina is far more diverse than previously thought, suggesting that several, independent introductions from its native area have recently occurred, and the implications of these findings in biogeographical and taxonomic terms are discussed.

}, issn = {1469-7998}, doi = {10.1111/j.1469-7998.1989.tb05003.x}, url = {http://dx.doi.org/10.1111/j.1469-7998.1989.tb05003.x}, author = {Maria Ribas and Marta Riutort and Jaume Bagu{\~n}{\`a}} } @article {177, title = {Further Contribution to the Taxonomy of the {\guillemotleft} Dugesia Lugubris-Polychroa Group {\guillemotright} with Description of Dugesia Mediterranea N.SP. (Tricladida, Paludicola)}, journal = {Bolletino di zoologia}, volume = {42}, year = {1975}, note = {doi: 10.1080/11250007509430132}, month = {1975}, pages = {81-89}, publisher = {Taylor \& Francis}, isbn = {0373-4137}, url = {http://www.tandfonline.com/doi/abs/10.1080/11250007509430132}, author = {Mario Benazzi and Jaume Bagu{\~n}{\`a} and Ballester, R. and Puccinelli, I. and Papa, R. D.} } @article {88, title = {Taxonomy, ecology, and karyology of a new species of Phagocata from Spain, with a discussion on the phylogenetic systematics of the genus Phagocata s.l. (Platyhelminthes, Tricladida, Paludicola)}, journal = {Canadian Journal of Zoology}, volume = {73}, year = {1995}, pages = {557-568}, chapter = {557}, author = {Ronald Sluys and Maria Ribas and Jaume Bagu{\~n}{\`a}} } @article {8, title = {A robust molecular phylogeny of the Tricladida (Platyhelminthes: Seriata) with a discussion on morphological synapomorphies}, journal = {Proceedings of the Royal Society B: Biological Sciences}, volume = {265(1396)}, year = {1998}, month = {04/1998}, pages = {631-640}, chapter = {631}, url = {http://www.pubmedcentral.nih.gov/picrender.fcgi?artid=1689013\&blobtype=pdf}, author = {Salvador Carranza and D T Littlewood and K A Clough and I Ruiz-Trillo and Jaume Bagu{\~n}{\`a} and Marta Riutort} } @inbook {642, title = {Molecular taxonomy and phylogeny of the Tricladida}, booktitle = {Interrelationships of the Platyhelminthes}, year = {2001}, pages = {49-56}, publisher = {Taylor \& Francis}, organization = {Taylor \& Francis}, chapter = {6}, address = {London}, author = {Jaume Bagu{\~n}{\`a} and Salvador Carranza and Jordi Paps and I{\~n}aki Ruiz-Trillo and Marta Riutort} } @article {9, title = {Molecular phylogeny of land and freshwater planarians (Tricladida, Platyhelminthes): from freshwater to land and back}, journal = {Molecular Phylogenetics and Evolution}, volume = {47}, number = {2}, year = {2008}, month = {05/2008}, pages = {555-568}, chapter = {555}, abstract = {

The suborder Tricladida (phylum Platyhelminthes) comprises the well-known free-living flatworms, taxonomically grouped into three infraorders according to their ecology: Maricola (marine planarians), Paludicola (freshwater planarians), and Terricola (land planarians). Molecular analyses have demonstrated that the Paludicola are paraphyletic, the Terricola being the sister group of one of the three paludicolan families, the Dugesiidae. However, neither 18S rDNA nor COI based trees have been able to resolve the relationships among species of Terricola and Dugesiidae, particularly the monophyly of Terricola. Here, we present new molecular data including sequences of nuclear genes (18S rDNA, 28S rDNA) and a mitochondrial gene (COI) of a wider sample of dugesiid and terricolan species. The new sequences have been analyzed, together with those previously obtained, in independent and concatenated analyses using maximum likelihood and bayesian methods. The results show that, although some parts of the trees remain poorly resolved, they support a monophyletic origin for Terricola followed by a likely return of some species to freshwater habitats. Relationships within the monophyletic group of Dugesiidae are clearly resolved, and relationships among some terricolan subfamilies are also clearly established and point to the need for a thorough revision of Terricola taxonomy.

}, doi = {10.1016/j.ympev.2008.01.032}, url = {http://www.sciencedirect.com/science/article/pii/S1055790308000390}, author = {Marta {\'A}lvarez-Presas and Jaume Bagu{\~n}{\`a} and Marta Riutort} } @article {158, title = {A new higher classification of planarian flatworms (Platyhelminthes, Tricladida)}, journal = {Journal of Natural History}, volume = {43}, year = {2009}, pages = {1763{\textendash}1777}, chapter = {1763}, url = {http://each.uspnet.usp.br/planarias/Artigos/Geoplanidae/2009-Sluys-et-al-A\%20new\%20higher\%20classification\%20of\%20planarian\%20fl.pdf}, author = {Ronald Sluys and Masaharu Kawakatsu and Marta Riutort and Jaume Bagu{\~n}{\`a}} } @article {18, title = {Molecular barcoding and phylogeography of sexual and asexual freshwater planarians of the genus Dugesia in the Western Mediterranean (Platyhelminthes, Tricladida, Dugesiidae).}, journal = {Molecular Phylogenetics and Evolution}, volume = {52}, number = {3}, year = {2009}, month = {09/2009}, pages = {835-845}, chapter = {835}, abstract = {

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.

}, doi = {10.1016/j.ympev.2009.04.022}, author = {Eva M. L{\'a}zaro and Ronald Sluys and Maria Pala and Giacinta Angela Stocchino and Jaume Bagu{\~n}{\`a} and Marta Riutort} } @article {162, title = {Schmidtea mediterranea phylogeography: an old species surviving on a few Mediterranean islands?}, journal = {BMC Evolutionary Biology}, volume = {11}, number = {1}, year = {2011}, chapter = {274}, doi = {10.1186/1471-2148-11-274}, url = {http://www.biomedcentral.com/content/pdf/1471-2148-11-274.pdf}, author = {Eva M. L{\'a}zaro and Harrath, Abdul Halim and Stocchino, Giacinta and Maria Pala and Jaume Bagu{\~n}{\`a} and Marta Riutort} }