Additional new species of marine annelids from Clipperton Island (Nereididae: Pilargidae: Sabellariidae)

We herein present three additional new species of marine annelids collected during the Expédition Clipperton (Dec. 2004–Apr. 2005). A new species of nereidid polychaete, Perinereis hourdezi sp. nov. differs from P. websteri Conde-Vela, 2022, described from Bermuda, by having most parapodia with neuropodial postchaetal lobes (missing in P. websteri), jaws with up to 5 teeth (up to 10 in P. websteri), and Areas VII–VIII with 24 paragnanths in 3 regular bands (16 paragnaths in 2 rows in P. websteri). A new species of pilargid polychaete, Synelmis meziane sp. nov. differs from S. kirkegaardi Salazar-Vallejo, 2003 described from the Eastern Atlantic, because it has median segments with parapodial cirri fusiform mucronate (tapered in S. kirkegaardi), and ventral cirri 2 × as long as wide (as long as wide in S. kirkegaardi). A new species of sabellariid polychaete, Lygdamis mariae sp. nov. differs from L. nesiotes (Chamberlin, 1919) described from the Tuamotu Islands because it has outer paleae solid (annulate in L. nesiotes), and 14 pairs of inner paleae (17 in L. nesiotes). Keys to identify all species of group 1A (Hutchings et al. 1991) of Perinereis, and to all species in Synelmis and Lygdamis are also included.