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Warchałowska-Śliwa, E. and Bugrov, A.G. 2009. Karyotype of the South African katydid Hetrodes pupus (Linnaeus, 1758) (Orthoptera, Tettigoniidae) with special reference to relationships within the Hetrodinae subfamily. Zootaxa. 2137, 1 (Jun. 2009), 43–50. DOI:https://doi.org/10.11646/zootaxa.2137.1.5.