Ancistrosoma reductum is a species of beetle of the family Scarabaeidae.BioLib It is found in Peru.
Description Adults reach a length of about 23–25 mm. The upper and lower surfaces are black and highly glossy, while the antennae and legs are reddish-yellow. The head is entirely covered with appressed yellow scale-like setae and the pronotum is bordered at the margins and base by a narrow stripe of yellow scale-like setae. A continuous stripe is located on the disc, flanked on each side by a wider stripe in the form of an elongated spot.
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