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