Holotrichia costulata is a species of beetle of the family Scarabaeidae.Global Biodiversity Information Facility It is found in Cambodia and Thailand.
Description Adults reach a length of about . The upper surface is blackish-brown, dull and tomentose, while the underside is brown. The upper surface is glabrous except for the cilia on the margin of the pronotum and at the base of the pygidium. The underside of the thorax is covered with long, shaggy hairs.
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