Original figures A Buccinum nucleus Bruguière, 1789 (Lister 1770: pl. 976, fig. 32) B Planaxis semisulcatus G.B. Sowerby I, 1823 ([pl. 73], fig. 3).

 
 
  Part of: Strong EE, Bouchet P (2020) Hidden in plain sight: two co-occurring cryptic species of Supplanaxis in the Caribbean (Cerithioidea, Planaxidae). ZooKeys 991: 85-109. https://doi.org/10.3897/zookeys.991.57521