Family Chaetopteridae

Species: Spiochaetopterus costarum (Claparède 1869) References: Souza (2008)

Environment: Bay

Depth: 1–4 m

Coordinates: 27°35'S / 48°35'W

Note: This material needs to be revised. It is probably S. nonatoi Bhaud & Petti 2001 .