Palaeorhiza reginarum, or Palaeorhiza (Palaeorhiza) reginarum, is a species of bee in the family Colletidae and subfamily Hylaeinae. It is endemic to Australia. It was described by British entomologist Theodore Dru Alison Cockerell in 1905.
Distribution and habitat The species occurs in coastal eastern Australia. The type locality is Mackay, Queensland. It has also been recorded from Brisbane and Stradbroke Island.
Behaviour The adults are flying mellivores. Flowering plants visited by the bees include Cassia species.
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