South American shells in the AM collection. All figure pairs show the shell in apertural and dorsal views unless otherwise noted. A–F. Naesiotus quitensis; A, B. Naesiotus quitensis jacksoni, paratype, AM MA73506; H = 27.9 mm. C, D. Naesiotus quitensis orinus, paratype, AM MA73507; H = 24.9 mm. E, F. Naesiotus quitensis antisana paratype, AM MA73508; H = 23.2 mm. G–I. Tomigerus esamianus, AM MA112081; H = 10 mm, D = 14.2 mm; J, K. Scholvienia bambamarcaensis, AM MA106737; H = 19.9 mm; L–P. Lopesianus crenulatus; L, M. AM MA114588; H = 20.6 mm; N. AM MA114588, apertural view; H = 21.5 mm; O. AM MA114588, apertural view; H = 20.0 mm; P. Detail of the protoconch of AM MA114588; Q, R. Parabalea pilsbryi, paratype, AM MA73229; H = 12.0 mm; S, T. Zilchiella grandiportus, paratype, AM MA72774; H = 25.1 mm. Scale bars: 5 mm (A–F, H–I, L–P, S, T); 2 mm (Q, R); 1 cm (J, K); 0.5 mm (G).