Thaumastus species. i–iii T. insolitus (Preston, 1909), holotype NHMUK 1947.3.11.1 (H = 70.4) iv–vi T. inca (d’Orbigny, 1835), lectotype NHMUK 1854.12.4.116 (H = 75.4).

 
 
  Part of: Breure ASH, Ablett JD (2015) Annotated type catalogue of the Megaspiridae, Orthalicidae, and Simpulopsidae (Mollusca, Gastropoda, Orthalicoidea) in the Natural History Museum, London. ZooKeys 470: 17-143. https://doi.org/10.3897/zookeys.470.8548