There is a word "testis" in the name of Clonorchis sinensis. What is the relationship between it and testis?

This parasite has nothing to do with testicles, because it was found in an overseas Chinese in Kolkata in 1874, so it was named Clonorchiasis, and it was named Cobbold in 1875. According to the transliteration at that time, it was "clonorchiasis", and because it was found in Chinese, it was called "Clonorchiasis" for short, and this parasite was called "China".