decipiens Westerlund, 1883 Semisulcospira decipiens is a species of freshwater snail with an operculum, an aquatic gastropod mollusc in the family Semisulcospiridae.

Type specimen were collected during the Vega Expedition led by Adolf Erik Nordenskiöld in 1878–1880.

[2] This species was originally described under the name Melania niponica var.

decipiens by Swedish malacologist Carl Agardh Westerlund in 1883.

[3] This species occurs in Lake Biwa and in the Yodo River, Japan.