TY - JOUR A1 - Martin, Daniel A1 - Capa, Maria A1 - Martínez, Alejandro A1 - Costa, Ana Cristina T1 - Taxonomic implications of describing a new species of Loimia (Annelida, Terebellidae) with two size-dependent morphotypes T2 - European journal of taxonomy N2 - We describe Loimia davidi sp. nov. (Annelida, Terebellidae) from São Miguel Island (Azores). It resembles Loimia gigantea (Montagu, 1819) (English Channel) in having very large adults, the ventral shield shape and the types of capillary notochaetae (three), while differing in shape and colour of the lateral lappets, branchiae length, the arrangement of segments, ventral shields, uncini and pygidial papillae. Large (> 30 cm long) and small (≈ 5 cm long) specimens of L. davidi sp. nov. show typically interspecific morphological differences while clustering in a single entity after species delimitation analyses of a cytochrome c oxidase I fragment. Therefore, we consider them to belong to a single species and discuss the taxonomic implications of size-dependent morphological differences. Within Loimia, we (1) suggest that large specimens may have been scarcely reported due to their rarity and collecting difficulty, while small specimens may have been reported either as ‘sp.’ or as the ‘cosmopolitan’ Loimia medusa (Savigny, 1822), (2) evaluate the size-related morphological disparity in all described species using a hypervolume analysis, (3) identify possible similar size-dependency in previously described species, (4) summarise the morphological information of all known species of Loimia; and (5) discuss on the four species reported in Europe. T3 - European journal of taxonomy : EJT - 833:60-96 KW - Loimia KW - Azores Archipelago KW - European distribution KW - intraspecific morphological variability KW - short molecular distance Y1 - 2022 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/68757 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-687570 SN - 2118-9773 VL - 2022 IS - 833 SP - 60 EP - 96 PB - Muséum National d'Histoire Naturelle CY - Paris ER -