Rhinocyllus is a small genus of true weevil, with 4 species described.

[2] The host plants of this genus are thistles in the subtribe Carduinae.

[3] Its sister group is Bangasternus.

[3] The most well-known species is R. conicus which is a controversial agent of biological pest control which has been used against noxious thistles in the genera Carduus, Cirsium, Onopordum, and Silybum.

This Curculionidae-related article is a stub.