Description of new species of deep water Sthenolepis Willey, 1905 and Neoleanira Pettibone, 1970 (Annelida, Sigalionidae) from off Northern California, with the redescription of Sthenolepis spargens Fauchald, 1972 Author Cruz-Gómez, Christopher Departamento de Sistemática y Ecología Acuática, El Colegio de la Frontera Sur, Chetumal, Quintana Roo, Mexico Author Blake, James A. Aquatic Research & Consulting, 24 Hitty Tom Road, Duxbury, MA 02332, United States of America. & Department of Invertebrate Zoology, Museum of Comparative Zoology, Harvard University, 26 Oxford Street, Cambridge, MA 02138 United States of America text Zootaxa 2024 2024-09-12 5507 2 224 244 http://dx.doi.org/10.11646/zootaxa.5507.2.2 journal article 10.11646/zootaxa.5507.2.2 1175-5326 13757500 45620A75-87EA-4906-821B-DAF95AA516EB Genus Neoleanira Pettibone, 1970b Type species. Sigalion tetragonum Örsted, 1845 Diagnosis. (modified after Aungtonya 2002 ; Eibye-Jacobsen et al. 2022 ). Sigalioninae with oval prostomium. Median antenna with long style; median antennal ceratophore with a pair of auricles; lateral antennae rather long, fused with dorsal side of segment 1. Without facial tubercle. Segment 1 with dorsal ctenidial pads and inner tentacular lobes. Segment 3 with a long dorsal cirrus. Lateral lips of mouth aperture without labial lobes. Elytra colorless, smooth, or with tubercles and papillae. Neuropodia in median and posterior segment with three neuropodial lobes, one prechaetal and two postchaetal. Neurochaetae compound, with canaliculate blades; spines and simple chaetae might be present in upper position.