Holopeidae Wenz, 1938
Pachystrophia balclatchiensis
Pachystrophia contiguus
Pachystrophia devexa
Pachystrophia dilatata
Pachystrophia gotlandica
Pachystrophia helicoides
Pachystrophia inchoans
Pachystrophia inornatum
Pachystrophia mullockensis
Pachystrophia norvegicus
Pachystrophia subuloidea
Pachystrophia triquestra
Pachystrophia tuba
Pachystrophia vortex