This crumpled-looking bug is a real beetle mimicking a ladybug. From all the types of mimicry I would say this is Batesian mimicry (Ladybugs’ autohaemorrhaging) While ladybugs are welcome in gardens because of their habit of eating aphids, this fake-ladybug feeds on sweet potato foliage and other plants from the familiy Convolvulaceae, e.g. Morning-glories. I only saw it twice so far. First I thought this is a Ladybug that either just emerged from the pupae or is on its way to a bug heaven. They are just not as smooth and shiny as a lady bug. There are more than 3000 species in the subfamily Cassidinae, and they are generally called tortoise beetles. Actually there a lots of pretty metallic-coloured species, all with the round shape. Read this if you want to see some 47 million years old tortoise beetles fossils!
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