Taxonomic implications of describing a new species of Loimia (Annelida, Terebellidae) with two size-dependent morphotypes Author Martin, Daniel B1D58BF8-6FB4-41EE-9B0C-3E52632A42C4 Centre d’Estudis Avançats de Blanes (CEAB-CSIC), Carrer d’accés a la Cala Sant Francesc 14, 17300 Blanes (Girona), Catalunya, Spain. dani@ceab.csic.es Author Capa, María A5F87E39-A766-4619-915D-9FC759B56206 Departament de Biologia, Universitat de les Illes Balears, Carretera de Valldemossa, km 7.5, 07122 Palma, Mallorca, Illes Balears, Spain. maria.capa@uib.es Author Martínez, Alejandro 233D1520-C737-441E-ABBD-2A76E5444821 Molecular Ecology Group (MEG), Water Research Institute (IRSA), National Research Council of Italy (CNR). Largo Tonolli 50, 28922 Pallanza, Italy. amartinez.ull@gmail.com Author Costa, Ana Cristina 96258146-6B7E-4AED-A7CA-49B6D0F99458 Research Centre for Biodiversity and Genetic Resources (InBio / CIBIO), Departamento de Biologia, Faculdade de Ciências e Tecnologia, Universidade dos Açores. Ponta Delgada, São Miguel, Açores Arquipélago, Portugal. ana.cm.costa@uac.pt text European Journal of Taxonomy 2022 2022-08-01 833 60 96 http://dx.doi.org/10.5852/ejt.2022.833.1887 journal article 112247 10.5852/ejt.2022.833.1887 0bc0c715-d144-4f64-bb59-b15fe98e9704 2118-9773 6949902 F2C142A4-94C0-4D5E-86AD-925F23103A95 Genus Loimia Malmgren, 1866 Type species Loimia medusa ( Savigny, 1822 ) (by original designation). Diagnosis Based on Carrerette & Nogueira (2015) , Nogueira et al. (2015) and Wang et al. (2020) . Eyespots, if present, at basal part of prostomium; lobes on segments 1 and 3 or 1 and 2/3 (in combination of segment 2 and 3), sometimes also on segment 4. Three pairs of branching branchiae, on segments 2–4. Rectangular or trapezoidal mid-ventral shields from segments 2–3 to posterior region where notopodia terminate; last segments of the glandular region usually subdivided by transverse bands. Conical to rectangular notopodia beginning on segment 4, extending for 17 segments, until segment 20; notochaetae all narrowly winged. Neuropodia beginning from segment 5, bearing pectinate uncini, arranged in single rows on segments 5–10 and in double rows on segments 11–20. Genital papillae on segments 6–8. Pygidium smooth to papillate.