Riodinidae is the family of metalmark butterflies. The common name "metalmarks" refers to the small, metallic-looking spots commonly found on their wings. The 1,532 species are placed in 146 genera. Although mostly Neotropical in distribution, the family is also represented both in the Nearctic, Palearctic, Australasian (Dicallaneura), Afrotropic, and Indomalayan realms.

Nemeobiinae is a subfamily of Riodinidae, the metalmark family. The subfamily's members consist entirely of Old World members of the Riodinid family. Recent revisions to the subfamily have begun to include members located within the New World as well, however, the subfamily continues to encompass the entirety of the Old World Riodinids.