Which moth family contains the tussock moth genus Lymantria?

The moth family containing the tussock moth genus Lymantria is Erebidae.

Erebidae is one of the largest families of moths. It includes a diverse collection of groups formerly treated as separate families, including many tiger moths, lichen moths, underwings, and tussock moths. Classification has changed as molecular studies have clarified relationships.

Lymantria includes species such as Lymantria dispar, widely known as the spongy moth in North America and the gypsy moth in older usage. Its caterpillars can defoliate trees, especially during population outbreaks, while the adult moths have distinctive sexual differences in many populations.

Family-level identification can be difficult because Erebidae contains such varied body shapes and wing patterns. Lymantria is therefore best recognized through a combination of taxonomy, morphology, and geographic information rather than appearance alone.