Simplify the following text for a Grade 7 native English-speaking person.
Original: Later , it became apparent that organisms previously called Triactinomyxon dubium and T. gyrosalmo ( class Actinosporea ) were in fact triactinomyxon stages of M. cerebralis , whose life cycle was expanded to include the triactinomyxon stage .
Simplified: Later , they found out that other creatures called Triactinomyxon dubium and T. gyrosalmowere actually stages of M. cerebralis .