Diuncus haberkorni is a species of weevil found in India, Sri Lanka, Bangladesh, Taiwan, Java, Japan, Malaysia, New Guinea, South Korea, Taiwan, Thailand, and Vietnam. It is also imported to African countried such as South Africa, and Tanzania.
Body length is about 1.9 to 2.8 mm. The elytral summit is armed by two pairs of large denticles. Pronotum as long as wide where the basal half is punctate. Elytral declivity weakly bisulcate. Elytral interstriae 1, 3 to 6 are flat to weakly convex. This gives the finely sculptured appearance for the declivity.
A polyphagous species, it is found from many host plants.