|Unusual features||Four arms around the corners of the mouth, large boils|
|First appearance||"The Forgotten"|
|Last appearance||"Enemies Mine"|
Two larvae EVOs are seen transporting nanite-infused soil from Abysus, led by Breach and Circe underground. On another occasion, two larvae EVOs attacked Rex, Agent Six, and Bobo in the Bug Jar. Thankfully for Rex, he was able to catch a DNA sample for Doctor Holiday by using her molecular scanner.
Another inhabited the subways where Rex defeated it by luring it into a construction site and burying it under some steel girders. Afterward, it was later collared and taken into Providence custody.
- According to Rex, worm EVOs usually travel in pairs.