Watkinsia tenebrosa is a species of beetle of the family Scarabaeidae. It is found in Australia (Queensland).

Description Adults reach a length of about . The antennae are testaceous with a black club. The pronotum and scutellum are black with a cupreous reflection. The elytra are shining black with a slight aeneous reflection. There are punctures on the disc which are distributed in five rows.

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