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

Taxonomy This species belongs to the sericeus species group. The defining characters of this group include a suture on each side of the propygidium, the absence of setae on the disc of the pronotum and the short elytra.

Description Adults reach a length of about . The head, pronotum, scutellum, abdomen and ventral surface are black and the legs are black, but reddish towards the apices. The elytra are reddish brown with the lateral and basal margins darkened.

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