This lifeform is found widely in Africa. This lifeform is found widely in Eurasia. This lifeform is found widely in the Indo-Australian region. This lifeform is widespread in North America. This lifeform is found widely in the New World tropics. This lifeform is locally common in suitable environments.

Ciliophora, the Ciliate Group, contains unicellular animals that propel themselves with  numerous hairs on the sides of their bodies. The Paramecium that is frequently studied in elementary biology classes belongs here.

Protista kingdom (sometimes spelled as Protoctista) contains numerous phyla including unicellular animals and algae.