Liparetrus necessarius is a species of beetle of the family Scarabaeidae. It is found in Australia (Western Australia).
Taxonomy This species belongs to the luridipennis species group. The defining characters of this group include setae on the disc of the pronotum.
Description Adults reach a length of about . The head is black with a brownish anterior margin of the clypeus. The pronotum, abdomen and the ventral surface are black and the elytra are reddish brown with a black base.
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