Nepa rustica (non Fabricius, 1775): Fabricius, 1781: 333. Misidentification (see note). LT (J.T. Polhemus, 1994c: 692): female, S India, Coromandel [= Madras area]; BMNH (Banks coll.).
Nepa plana Sulzer, 1776: 92 (syn. Fabricius, 1787: 276). ST(S): aus Amerika, in error (see J.T. Polhemus, 1994c: 692).
Appasus marginicollis Dufour, 1863: 393 (syn. Distant, 1906a: 36). HT: female, Cochinchine [= Vietnam], Saigon; NHMW (coll. Signoret).
Diplonychus indicus Venkatesan & Rao, 1980: 299 (syn. J.T. Polhemus, 1994c: 692). HT: male, India, Madras; Loyola College Museum, Madras, India.