Simplify the following text for a Grade 11 native English-speaking person.
Original: Sphecomyrma was probably a ground forager but some suggest on the basis of groups such as the Leptanillinae and Martialinae that primitive ants were likely to have been predators underneath the surface of the soil .
Simplified: Sphecomyrma was probably a ground forager but some suggest that primitive ants were likely to have been predators underneath the surface of the soil .