This species is better known as Calthalotia comtessi (Iredale, 1931), which is synonymised under Calthalotia fragum (Philippi, 1848) in WoRMS, but C. indistincta has priority over both of these names. See Jansen, 1993.
Wilson, B., 1993, Australian Marine Shells. Prosobranch Gastropods Pt I. Odyssey Publishing, Leederville, W.A.
Scientific Name verified against:
Jansen, P., 1993. The family Trochidae (Mollusca: Gastropoda) in the Sydney metropolitan area and adjacent coast., Australian Zoologist, Vol. 29(1-2): 49-61.