Tiny shiny Beetle from the Amazon rainforest of Ecuador

This cute and colorful little beetle was filmed in the Amazon rainforest of Ecuador. It is about 6 mm in length and belongs to the genus Chlamisus in the leaf beetle family Chrysomelidae, Cryptocephalinae. These warty beetles are supposed to mimic caterpillar droppings, which gives them an advantage in the struggle for survival by protecting them from being eaten by birds, but which caterpillar leaves shiny fuchsia and purple droppings?