Pyrgiscus crenatus is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
There is disagreement regarding whether Pyrgiscus rufus <small>(Philippi, 1836)</small> and Pyrgiscus fulvocinctus are different species (e.g. according to Peñas & Rolán in Gofas et al., 1999; Giannuzzi-Savelli et al., 2014; Høisæter, 2014) or the same species (e.g. van Aartsen, 1981). In the former case it cannot be determined to which of the two species corresponds the earliest name Pyramis crenatus <small>Brown, 1827</small>, which Høisæter treated as a nomen dubium.
This marine species occurs in the following locations: