Traits (2024). Pheretima alexandri gracilior Gates, 1931. Accessed at: https://marinespecies.org/traits./aphia.php?p=taxdetails&id=1074622 on 2024-09-05
Marine Species Traits editorial board (2024). Marine Species Traits. Pheretima alexandri gracilior Gates, 1931. Accessed at: https://marinespecies.org/traits./aphia.php?p=taxdetails&id=1074622 on 2024-09-05