Phasma gigas is a large-sized stick insect found in Maluku Islands, Gorong Islands and Kei Islands.Brock, P.D., Büscher, T. & Baker, E. Phasmida Species File Online. Version 5.0/5.0. Retrieved 4 April 2022. http://Phasmida.SpeciesFile.org It is often believed that Phasma gigas is present on New Guinea, but in fact, all New Guinean records actually refer to Phasma reinwardtii.Hennemann FH, Conle OV, Suzuki S. A study of the members of the tribe Phasmatini Gray, 1835, that occur within the boundaries of Wallacea (Phasmatodea: Phasmatidae: Phasmatinae: "Lanceocercata"). Zootaxa. 2015 Sep 1;4008:1-74. . PMID 26623839 Furthermore, the historic records from Sulawesi are doubtful and need more evaluation.

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