Leptoecia Chamberlin, 1919: 319 –323, pl. 36, figs. 1–6, pl. 37, figs. 1–8.— Kucheruk, 1978: 90.— Paxton, 1986: 30 –32, fig. 18.— Orensanz, 1990: 54 –55.
Paronuphis.— Hartman, 1964: 115 –117 (in part).— Hartman, 1965: 110 –111 (in part). Paraonuphis.— Kucheruk, 1977: 44 –45 (in part).
Parhyalinoecia Hartmann-Schröder, 1975: 65 –68, figs. 32–38.— Kucheruk, 1978: 89. Neonuphis Kucheruk, 1978: 93 –95, fig. 2.— Paxton, 1986: 32 –34, fig. 19.
Type species Leptoecia abyssorum Chamberlin, 1919: 320, by original designation
Diagnosis. Frontal lips hemispherical, reduced or absent; subacicular hooks in median position; first pair of parapodia prolonged with auricular prechaetal lobes; two pairs of subulate ventral cirri; simple or pseudocompound falcigers on one or two pairs of anterior parapodia; anterior falcigers uni- or bidentate with blunt hoods; peristomial cirri absent; maxillae V absent; tubes secreted, quill-like, circular in cross-section or flattened dorsoventrally, with two longitudinal ribs.