Lumbrineris is restricted and redefined, and species are redescribed based upon type materials. The generic diagnostic features are chaetae of three types: simple and compound multidentate hooded hooks, and limbate chaetae; the maxillary apparatus is labidognath with five pairs of maxillae, maxillae II are as long as maxillae I with wide connecting plate slightly developed along the base of maxillae II. Lumbrineris, as herein redefined includes L. albifrons, L. amboinensis, L. aniara, L. annulata, L. californiensis, L. cingulata, L. coccinea, L. crosnieri sp. nov., L. cruzensis, L. floridana, L. futilis, L. grandis, L. higuchiae sp. nov., L. imajimai sp. nov., L. index, L. indica sp. nov., L. inflata, L. inhacea, L. japonica, L. kerguelensis, L. knoxi sp. nov., L. latreilli, L. limicola, L. magalhaensis, L. mustaquimi sp. nov., L. nasuta, L. nishii sp. nov., L. nonatoi, L. oculata, L. oxychaeta, L. pallida, L. paucidentata, L. perkinsi, L. reunionensis sp. nov., L. setosa, L. vanhoeffeni. The taxonomic status of 21 other species originally described as Lumbrineris is discussed. A key to all valid species is included.