Key to the species of Loimia Malmgren, 1866 present along the Brazilian coast

1. Eyespots, if present, small and arranged in two narrow rows on prostomium....................................... 2

- Large, dark eyespots, progressively smaller from dorso-laterally to lateral at base of prostomium.................................................................................................... .. Loimia megaoculata sp. nov.

2. Tentacles without pigmentation; eyespots absent; lobes of segment 1 stout, nearly reaching level of upper lip; uncini with 5–8 teeth, including main fang............................................................. Loimia armata sp. nov.

- Tentacles with dark brown transverse bands; eyespots in two narrow rows; lobes of segment 1 thin, reaching mid-length of upper lip; uncini with 5–6 teeth, including main fang.................................... Loimia brasiliensis sp nov.