Ciliata

Japanese: Ciliata

...The most well-known are the malaria parasite Plasmodium that causes malaria and the coccidia that are parasites of chickens and cause high mortality. (4) Ciliata Ciliata are the most differentiated group of protozoa, with the body surface covered with cilia and a large number of cilia gathering together to form complex organs. They have two types of nuclei: macronuclei and micronuclei.

From [Ciliate Protozoa]

…A general term for protozoa belonging to the subphylum Ciliata. It includes Paramecium, Stentor, and Vorticella. Most live freely in freshwater or seawater, but many are parasitic.

*Some of the terminology explanations that mention "Ciliata" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…マラリアを起こすマラリア病原虫やニワトリの雛の寄生虫で死亡率の高いコクシジウムなどが有名である。(4)繊毛虫綱Ciliata　繊毛虫は原生動物中もっとも分化した群で，体表面が繊毛で覆われていたり，多数の繊毛が集まって複雑な器官を形成している。大核と小核の2種の核をもつ。…