Nematodes are microscopic round worms whose size varies from 0.2 mm to a few metres. They are found in soil and waterways and are often used in pest control because they naturally parasitize on various insect pests.

The new species was discovered in soil samples under the longan tree in Thailand. It is small in size, measuring only about 0.04 inches in length. The worm has been named Steyanernema adamsii after discoverer, Byron Adams, the head of Biology at Brigham Young University.