Sondhi, S., Basu, D.N., Sondhi, Y. and Kunte, K. 2020. A new species of Metallolophia Warren, 1895 (Lepidoptera: Geometridae: Geometrinae), and notes on M. opalina (Warren, 1893), from eastern Himalaya, India. Zootaxa. 4838, 2 (Aug. 2020), 289–297. DOI:https://doi.org/10.11646/zootaxa.4838.2.9.