Coleoptera Worm Aeneus is a Worm and antagonist in episodes 9 and 10 of Kamen Rider Kabuto.
Kamen Rider Kabuto
Croceus and two other Coleoptera Worms molted from a group of Salis Worms fighting against Shadow. After Aeneus was destroyed by Kabuto with his Rider Kick, Croceus and Argentum fled the scene. However, Kabuto managed to catch up to them and destroyed Croceus with his Rider Kick.
Kamen Rider Decade: All Riders vs. Dai-Shocker
Coleoptera Worm Croceus was among the monsters who were part of the Dai-Shocker army in the World of Decade. They fought against a gathering of 25 Kamen Riders who formed to oppose Dai-Shocker's invasion of the A.R. Worlds.