| Family | Common Name | Selected Genus and Species | Image |
|---|---|---|---|
| Arhynchonemertidae | Ribbon Worm | Arhynchonemertes axi | |
| Gorgonorhynchidae | Gorgon Worm | Gorgonorhynchus albocinctus | |
| Lineidae | Ribbon Worm | Lineus longissimus | |
| Mixolineidae | Ribbon Worm | Mixolineus levitrontosus | |
| Panorhynchidae | Ribbon Worm | Panorhynchus argentinensis | |
| Polybrachiorhynchidae | Ribbon Worm | Polydendrorhynchus zhanjiangensis | |
| Valenciniidae | Ribbon Worm | Baseodiscus princeps | |