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The Miridiba lamellata species group (Coleoptera: Scarabaeidae: Melolonthinae: Rhizotrogini) is established. Miridiba dugonga Gao, new species is described and illustrated. A key to the species groups in the genus Miridiba Reitter is also provided. Miridiba lamellata Gao and Fang, 2019 is recorded from Vietnam for the first time.
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Gao et al. (2022) studied this question.
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