Tetralobus flabellicornis, the Giant Acacia Click Beetle, is a species of click beetle belonging to the family Elateridae.

Tetralobus flabellicornis can reach a length of 60–80 millimetres (2.4–3.1 in).

This large click beetle has a dark brown to black body covered with a brownish grey pubescence, the latter showing a weak to medium reflectance in the near-infrared.

[1] The quite long antennae carry large lamellae in males, while they are serrate in females.

This species is widespread in South Africa, Namibia, Democratic Republic of Congo, Senegal, Zambia, Zanzibar, Liberia and Zaire.