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Ünal, M. 2009. Spinisternum castaneipictus Willemse, 1966 (Orthoptera: Tettigoniidae: Conocephalinae) from Papua New Guinea, with description of the male and remarks on the relationship. Zootaxa. 2055, 1 (Mar. 2009), 61–68. DOI:https://doi.org/10.11646/zootaxa.2055.1.4.