Key to species of Hermundura found in Brazilian waters

1. Notopodial spines from chaetiger seven.................................................................... 2

- Notopodial spines from chaetiger nine or ten................................................................ 3

2. Notacicula emergent from chaetiger two, neurochaetae comprising finely hirsute spiral capillaries, pygidium rounded and depressed with three cirri subequal.............................................. Hermundura tricuspis Müller, 1858

- Notacicula emergent from chaetiger seven, neurochaetae hirsute and simple capillaries, pygidium globose with three cirri subequal........................................................ Hermundura fauveli (Berkeley & Berkeley, 1941)

3. First two chaetigers are uniramous, subsequent ones unequally biramous, neurochaetae hirsute capillaries, a pair of subcutaneous eyes.................................................... Hermundura ocularis (Emerson & Fauchald, 1971)

- Only first chaetiger uniramous and subsequent ones biramous, neurochaetae hirsute and simple capillaries, chaetiger three to five lack dorsal or ventral cirri........................................... Hermundura americana (Hartman, 1947)