Morphology of Stenoninereis species A non-type of S. lackeyi comb. n. (USNM 53273) B, I syntypes of S. elisae sp. nov. (USNM 55366) C–F non-type of S. elisae sp. nov. (USNM 55360) G non-type of S. martini Wesenberg-Lund 1958 (USNM 61623) H holotype of S. tecolutlensis de León-González & Solís-Weiss, 1997 (USNM 174870) A anterior end, dorsal view B chaetiger 6, left parapodium (solid and dashed red lines: vessels; solid and dashed light blue lines: unknown structures, likely nerves) C shaft of notopodial sesquigomph spinigers, chaetiger 20 D shaft of neuropodial supra-acicular sesquigomph spiniger, same chaetiger E shaft of neuropodial sub-acicular heterogomph spiniger, chaetiger 20 F Shaft of neuropodial sub-acicular heterogomph falciger, chaetiger 20 G–I anterior ends, dorsal view. Abbreviations: AC, anterior cirri; An, antennae; Cp, cirrophore; Cs, cirrostyle; DC, dorsal cirrus; Es, esophagus; NeL, neuroacicular ligule; NoD, notopodial dorsal ligule; NoV, notopodial ventral ligule; Ph, pharynx; Pp, palpophore; Ps, palpostyle; VC, ventral cirrus; ¿?, unknown structures, likely nerves by their position. Scale bars: 0.2 mm (A, G–I); 0.1 mm (B); 5 µm (C–F).