Lumbrineris lanai n. sp., a new species of polychaete (Annelida: Eunicida: Lumbrineridae) from the Robinson Crusoe Island, Juan Fernandez Archipelago, off the coast of Chile

Abstract We describe a new species of the genus Lumbrineris de Blainville, 1828 with material collected in nine diferente locations around the Robinson Crusoe Island, Juan Fernández Archipelago (Lat. 33º 36’ and 33º 46’ S and Long. 80º 47’ and 78º 47’ W) from sandy bottoms, between 4–10 m depth. One hundred seventy-nine specimens were examined. The new species is characterized because M2 have three big teeth and a small distal bump; M3 and M4 are unidentate; composite multidentate hooded hooks reach up to chaetiger 23, with blades of varying lengths, and yellow aciculae. We consider Lumbrineris lanai n. sp. as the only valid species of Lumbrineridae recorded so far in Robinson Crusoe Island. This work contributes to the knowledge of the Chilean insular polychaete fauna and the Lumbrineridae family worldwide.