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- © Joseph Redtenbacher: Die Insektenfamilie der Phasmiden. Vol. 1. Phasmidae Areolatae. Tafel/plate I, Abb./pict. 17 & 18. Wilhelm Engelmann, Leipzig 1906
- Copyright licence: Marked as being in the public domain
- Provenance: http://media.eol.org/content/2012/09/11/04/35122_orig.jpg