| Petitia amphophthalma Siewing, 1956 |
| Pionosyllis Malmgren, 1867 |
| Pionosyllis aciculata San Martín, 1990 |
| Pionosyllis aciculigrossa San Martín, 1990 |
| Pionosyllis articulata Kudenov & L. Harris, 1995 |
| Pionosyllis augeneri Hartmann-Schröder, 1979 |
| Pionosyllis dangrigae Russell, 1987 |
| Pionosyllis divaricata (Keferstein, 1862) |
| Pionosyllis elongata Johnson, 1901 |
| Pionosyllis gesae Perkins, 1981 |
| Pionosyllis homocirrata (Hartmann-Schröder, 1958) |
| Pionosyllis lamelligera Saint-Joseph, 1887 |
| Pionosyllis luquei San Martín, 1990 |
| Pionosyllis oculata Hartmann-Schröder, 1960 |
| Pionosyllis procera Hartman, 1965 |
| Pionosyllis riojai San Martín, 1990 |
| Pionosyllis singulariseta Russell, 1987 |
| Pionosyllis spinisetosa San Martín, 1990 |
| Pionosyllis subterranea Hartmann-Schröder, 1956 |
| Pionosyllis templadoi San Martín, 1991 |