Entocolax ludwigii

Entocolax ludwigii is a species of parasitic sea snail, a marine gastropod mollusk in the family Eulimidae. The species is notable for being commonly misspelled as Entocolax ludwigi, this was the original name for this species of Caenogastropoda, the incorrect name was corrected shortly after Voigt gave the taxonomic name for this species in 1888.