Question

We are classifying different pond organisms, and im stuck on paramecium because i know that it belongs to the protista kingdom, but when i look up the phyla it comes up as Ciliophora but the only ones we have to classify them with are Chordate, Mollusk, Annelids, Arthropod. Anyone know what i did wrong or which phyla it would fit under???? HELPPPPPP!!!!!!!