New taxa in: RAVEN, J.G.M., 2021. Notes on molluscs from NW Borneo 8. Stromboidea (Gastropoda, Neogastropoda). Addendum, including the description of two new genera and seven new extinct species.

Onustus undosus Raven 2021 – holotype

Type locality. — Tutong 13 outcrop, Tutong, Brunei.
Late Miocene.