EN
The planthopper genus Montrouzierana Signoret, 1861 (Hemiptera: Fulgoromorpha: Tropiduchidae) and its only known endemic species to New Caledonia, M. oxycephala (Montrouzier, 1861), are redescribed. Illustrations of diagnostic characters including male and female genitalia are provided. The systematic position of the genus is briefly discussed. Morphological characters and distribution data suggest a recent dispersal event to New Caledonia, probably from Australia, linked with a possible relaxation/inhibition of ancestral constraints on feeding behaviour.