statistical parsimony networks and species assemblages in cephalotrichid nemerteans (nemertea)统计吝啬网络和物种组合cephalotrichid纽虫(纽形动物门).pdfVIP

Statistical Parsimony Networks and Species Assemblages in Cephalotrichid Nemerteans (Nemertea) 1,2 3 4 1 5 Haixia Chen , Malin Strand , Jon L. Norenburg , Shichun Sun , Hiroshi Kajihara , 6 7 2 Alexey V. Chernyshev , Svetlana A. Maslakova , Per Sundberg * 1 Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, China, 2 Department of Zoology, University of Gothenburg, Gothenburg, Sweden, ´ ¨ ¨ 3 Sven Loven Centre for Marine Sciences, Tjarno, Sweden, 4 Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, D.C., United States of America, 5 Department of Natural History Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan, 6 Far East Division, A.V. Zhirmunsky Institute of Marine Biology, Russian Academy of Sciences, Vladivostok, Russia, 7 Oregon Institute of Marine Biology, University of Oregon, Charleston, Oregon, United States of America Abstract Background: It has been suggested that statistical parsimony network analysis could be used to get an indication of species represented in a set of nucleotide data, and the approach has been used to discuss species boundaries in some taxa. Methodology/Principal Findings: Based on 635 base pairs of the mitochondrial protein-coding gene cytochrome c oxidase I (COI), we analyzed 152 nemertean specimens using statistical parsimony network analysis with the connection probability set to 95%. The analysis revealed 15 distinct networks together with seven singletons. Statistical parsimony yielded three networks supporting the species status of Cephalothrix rufifrons, C. major and C.