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      Rediscovery of the nemertean Prostoma graecense from Xochimilco, 75 years after its first and only record Translated title: Redescubrimiento del nemertino Prostoma graecense de Xochimilco, 75 años después de su primer y único registro

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          Abstract

          Abstract: The identity of the freshwater nemertean Prostoma graecense (Böhming, 1892) from Lake Xochimilco is solved 75 years after its first recording. Identification of the specimens was accomplished via both morphological and molecular means, the latter employing the mitochondrial cytochrome c oxidase subunit I. Recent literature and our results suggest that this species has a cosmopolitan distribution and has, presumably, been recently introduced to areas well removed from its original distribution, which is unknown. The current study provides a background for continuing the work with freshwater and marine nemerteans and underscores the importance of including molecular data in future studies of the group.

          Translated abstract

          Resumen: Se resuelve la identidad taxonómica del nemertino dulceacuícola Prostoma graecense (Böhming, 1892) del lago de Xochimilco 75 años después del primer registro. La identificación de los ejemplares se realizó con base en caracteres morfológicos y moleculares, esta última empleando el citocromo c oxidasa subunidad I mitocondrial. La literatura reciente y nuestros resultados sugieren que esta especie tiene una distribución cosmopolita y que ha sido introducida, presumiblemente, en áreas lejanas de su distribución original, la cual es desconocida. El presente estudio proporciona un contexto para continuar los estudios sobre nemertinos de agua marina y dulceacuícola y enfatiza la importancia de incluir datos moleculares en futuros estudios del grupo.

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            The CLUSTAL_X windows interface: flexible strategies for multiple sequence alignment aided by quality analysis tools.

            CLUSTAL X is a new windows interface for the widely-used progressive multiple sequence alignment program CLUSTAL W. The new system is easy to use, providing an integrated system for performing multiple sequence and profile alignments and analysing the results. CLUSTAL X displays the sequence alignment in a window on the screen. A versatile sequence colouring scheme allows the user to highlight conserved features in the alignment. Pull-down menus provide all the options required for traditional multiple sequence and profile alignment. New features include: the ability to cut-and-paste sequences to change the order of the alignment, selection of a subset of the sequences to be realigned, and selection of a sub-range of the alignment to be realigned and inserted back into the original alignment. Alignment quality analysis can be performed and low-scoring segments or exceptional residues can be highlighted. Quality analysis and realignment of selected residue ranges provide the user with a powerful tool to improve and refine difficult alignments and to trap errors in input sequences. CLUSTAL X has been compiled on SUN Solaris, IRIX5.3 on Silicon Graphics, Digital UNIX on DECstations, Microsoft Windows (32 bit) for PCs, Linux ELF for x86 PCs, and Macintosh PowerMac.
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              Disentangling ribbon worm relationships: multi-locus analysis supports traditional classification of the phylum Nemertea

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rmbiodiv
                Revista mexicana de biodiversidad
                Rev. Mex. Biodiv.
                Instituto de Biología (México, DF, Mexico )
                1870-3453
                2007-8706
                2018
                : 89
                : 1
                : 39-45
                Affiliations
                [3] orgnameUniversidad Nacional Autónoma de México orgdiv1Instituto de Biología orgdiv2Laboratorio de Microscopia Electrónica Mexico
                [4] orgnameUniversidad Nacional Autónoma de México orgdiv1Facultad de Ciencias orgdiv2Laboratorio de Microscopia Electrónica Mexico
                [1] orgnameUniversidad Nacional Autónoma de México orgdiv1Facultad de Ciencias orgdiv2Departamento de Biología Comparada Mexico
                [2] orgnameUniversidad Nacional Autónoma de México orgdiv1Instituto de Biología orgdiv2Laboratorio de Helmintología Mexico
                Article
                S1870-34532018000100039
                10.22201/ib.20078706e.2018.1.2094
                07ad2c51-b2a5-4813-897b-1784692a2d49

                This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

                History
                : 23 January 2017
                : 27 September 2017
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 37, Pages: 7
                Product

                SciELO Mexico


                Invertebrados dulceacuícolas,Nemertea,Tetrastemmatidae,Cox1,Taxonomía,Freshwater invertebrates,Taxonomy

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