What is "filarioidea"

The Filarioidea are a superfamily of nematodes (roundworms). The members of this superfamily are known as filarial worms. Infections with parasitic filarial worms cause filariasis. Drugs against these worms are known as filaricides.

It consists of seven families: Aproctidae, Creagrocercidae, Drilonematidae, Filariidae, Homungellidae, Mesidionematidae, Scolecophilidae, Setariidae (which has a single genus Setaria), and Ungellidae.