Falniowskia neglectissima is a species of freshwater snail with an operculum, an aquatic gastropod mollusk in the family Hydrobiidae, the snouted freshwater snails.

F. neglectissima occurs in Southern Poland and Ukraine.

[1][2][3] F. neglectissima inhabits freshwater springs.

[1] F. neglectissima was originally assessed as Near Threatened (LR/nt) for the 1996 IUCN Red List, as it is restricted to springs in a small geographical area.

However, individuals have not been found since 1988 and it is currently considered data deficient;[1] it is listed as critically endangered in the Polish Red Data Book of Animals.