Christensen C.C. (2016). Change of status and name for a Hawaiian freshwater limpet:
Ancylus sharpi Sykes, 1900 is the invasive North American
Ferrissia californica (Rowell, 1863), formerly known as
Ferrissia fragilis (Tryon, 1863) (Gastropoda: Planorbidae: Ancylinae).
Bishop Museum Occasional Papers. 118: 5-8.