Sust. FEM. Small or tiny animals, especially the imperceptible to the naked eye, or those that thrive in restricted habitats. Etymology: grecolatino hybrid composed of the Greek adjective «mikrós»: short, small, and the Latin noun 'fauna', of Fauna - daughter of Faunus, God of fertility of herds and fields-Roman goddess of fertility, chastity and health. He also appointed «Bona Dea ( good goddess )» and «Maia». Antonym: macrofauna.