Brachypelma Worm Aurantium is a Worm of the tarantula-like Brachypelma sub-class and an antagonist in episodes 21 and 22 of Kamen Rider Kabuto.
Kamen Rider Kabuto
Aurantium, alongside his fellow Brachypelma Worm Viridis, served as one of the guards of the Worm Eggs.
Kamen Rider Decade
Brachypelma Worm Aurantium, along with Brachypelma Worm Viridis, was among the Dai-Shocker forces stationed in the World of Black RX. It was defeated alongside Viridis by the A.R. Kamen Rider Black R.X.