1	Anterior parapodia with notopodial prechaetal lobes small, inconspicous; unidentate ankylosed chaetae present in epitokous stage	Websterinereis glauca
–	Anterior parapodia with notopodial prechaetal lobes distinct	2
2	Neuropodial falcigers with long blades	3
–	Neuropodial falcigers with short blades	4
3	Longest tentacular cirri reach chaetiger 6; notopodial prechaetal lobe present along body; bidentate ankylosed chaetae present on median and posterior parapodia	Websterinereis punctata
–	Longest tentacular cirri reach chaetiger 2 (1-4); notopodial prechaetal lobe present only on anterior region; ankylosed chaetae absent	Websterinereis tridentata
4	Longest tentacular cirri reach chaetiger 1; notopodial prechaetal lobe thin, digitiform; notopodial dorsal and ventral ligules increasing in length slightly on posterior parapodia	Websterinereis foli
–	Longest tentacular cirri reach chaetiger 3; notopodial prechaetal lobe triangular; notopodial dorsal and ventral ligule are progressively smaller in posterior parapodia	Websterinereis pettiboneae