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Type: Article
Published: 2021-12-20
Page range: 301-321
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Molecular taxonomy and description of a new species of Limnodrilus (Naididae, Clitellata, Annelida) in China

State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China 2University of Chinese Academy of Sciences, Beijing 100049, China
Ecological Environment Monitoring and Scientific Research Center, Yangtze River Basin Ecological Environment Administration, Ministry of Ecological Environment, Wuhan 430010, China
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
Department of Biological and Environmental Sciences, University of Gothenburg, Gothenburg, Sweden
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
Annelida Limnodrilus L. paraclaparedianus Zhou & Cui n. sp. Taxonomy Phylogenetic tree Oligochaetes


The freshwater annelid worm genus Limnodrilus, including the widely distributed L. claparedianus Ratzel, 1868, is common in Chinese freshwater ecosystems. One species, previously recognized as morphologically intermediate between L. claparedianus and the North American taxon L. cervix Brinkhurst, 1963, is here described as a new species, L. paraclaparedianus Zhou & Cui n. sp., using both molecular and traditional taxonomy. Comparisons of sequences of the Cytochrome Oxidase subunit I (COI) mtDNA in a sample of Limnodrilus species showed that the distances between species were generally higher than the divergences within them. Phylogenetic analysis of COI as well as 16S mtDNA and Internal Transcribed Spacer 2 (ITS2) nDNA confirmed that the new species is an independent lineage. Moreover, morphological differences in the prostomium, characteristics of the chaetae and internal genitalia support the separation of the species.



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