Exolontha tonkinensis is a species of beetle of the family Scarabaeidae.Global Biodiversity Information Facility It is found in Laos, Myanmar, Thailand and China (Yunnan).
Description Adults reach a length of about . They are very similar to Exolontha umbraculata in shape and colouration, but differs immediately in that eight ribs project from the sutural rib on each elytron. The penultimate rib is greatly shortened, in that it does not reach the middle of the elytron from the posterior margin.
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