- Siphoncolus nudus Linnaeus, 1766

- Siphunculus balanophorus Delle Chiaje, 1823

- Siphunculus nudus Linnaeus, 1766

- Siphunculus reticulatus Martin, 1786

- Sipunculus balanophorus Delle Chiaje, 1823

- Sipunculus delphinus Murina, 1967

- Sipunculus eximinoclathratus Baird, 1868

- Sipunculus eximioclathratus Baird, 1868

- Sipunculus gigas Quatrefages, 1865

- Sipunculus norvegicus vemae Stephen, 1966

- Sipunculus nudus nudus

- Sipunculus nudus tesselatus (Rafinesque, 1814)

- Sipunculus nudus var. tesselatus Costa, 1853

- Sipunculus tesselatus (Rafinesque, 1814)

- Sipunculus titubans Selenka & Bülow, 1883

- Sipunculus titubans diptychus W.Fischer, 1895

- Sipunculus titubans dyptichius Fischer, 1894

- Sipunculus titubans titubans

- Sipunculus titubans var. diptychus Fischer, 1894

- Syphunculus nudus var. tessellatus Costa, 1853