Bal D. Rediscovery of the Sumatran endemics Onychogomphus rappardi (Odonata: Gomphidae) and Herona sumatrana sumatrana (Lepidoptera: Nymphalidae), with notes on observations of other rare species from the north of Sumatra. BIO PALEMBANICA [Internet]. 2024 Dec. 24 [cited 2025 Jan. 22];1(2):48-5. Available from: https://ejournal.uigm.ac.id/index.php/biopalembanica/article/view/4921