Abstract
Abstract Benthic samples collected during several cruises from shelf areas along the West African coast from Morocco to Angola, have highlighted a huge diversity of magelonid species (over 20 species), many of which are undescribed. The majority of samples were taken as part of two large-scale projects in the region: the Canary Current Large Marine Ecosystem project (CCLME) and the Guinea Current Large Marine Ecosystem project (GCLME). Six magelonid species bearing posterior thoracic pigmentation have been highlighted, Magelona alleni and five species new to science: Magelona fasciata sp. nov., Magelona guineensis sp. nov., Magelona mackiei sp. nov., Magelona nanseni sp. nov. and Magelona picta sp. nov. West African magelonids and comparative material from the UK and Norway have been investigated using COI, 16S and 28S markers. An integrated taxonomic approach is used to delineate species of Magelona carrying posterior thoracic pigmentation. These species from West African waters constitute a well-supported monophyletic group, with the species M. alleni being sister to the new species herein described. Our 41 COI DNA-barcode-sequences had between species distances from 9.3 to 26.8% and were allocated to ten different BINs in Boldsystems.org.
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