Belonidium

Belonidium may refer to:
 * Belonidium Ehrenberg, 1854, fossil genus of Chromista, Bacillariophyceae
 * Belonidium Durieu de Maisonneuve, 1848, synonym of Lachnum Retzius, 1795, genus of fungi
 * Belonidium (gastropod) Cossmann, 1892, a genus of gastropods; see Eulimella