|This article is about a/an monster in Kamen Rider, the original series.|
Antchimedes (アリキメデス Arikimedesu, 35 & Rider vs Shocker) - A queen ant monster. She was able to release formic acid and used traps during battle. Her personal emblem, worn by the Combatants under her command, was an ant. Hayato Ichimonji and Kazuya Taki attacked the outpost commanded by Antchimedes and stole an egg from there. Trying to recover it, they fought again. She was destroyed after getting hit by Kamen Rider 2's Rider Kick and falling into a pond of formic acid.
Antchimedes made a brief return appearance in the monster army of the Kamen Rider vs. Shocker movie but did not actually have an active participation there.
- Antchimedes' name is likely a pun on Greek mathematician and inventor Archimedes.