For sculpture... there were two "genres" for each type of subject, determined by subject matter and formal features lke occasion, social function, and material, roughly as epinician poetry was considered to be a genre distinct from hymns by virtue of their differing subjects, performance settings, and meters. And the two "sculpture genres" were traditionally kept meticulously separate (Graham Zanker, Modes of Viewing in Hellenistic Poetry and Art, pg. 142.
