Ünal, Mustafa. 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). Auckland, New Zealand:61–68. https://doi.org/10.11646/zootaxa.2055.1.4.