Phobaeticus serratipes (formerly known as Pharnacia serratipes) is a species of stick insect that at one time was the longest known insect, with one female specimen recorded as being 555 mm long. This measurement includes the legs fully extended front and rear, and the actual length of the body alone is considerably shorter. This insect is endemic in Malaysia and Singapore. It is a popular species among those who raise stick insects.
The record for longest known insect is now held by a specimen of Phobaeticus chani measuring 567 mm, held in the Natural History Museum in London. Phobaeticus serratipes is also slightly shorter in body length than one specimen of Phobaeticus kirbyi.
- "Revision of Oriental Phasmatodea: The tribe Pharnaciini Günther, 1953, including the description of the world's longest insect, and a survey of the family Phasmatidae Gray, 1835 with keys to the subfamilies and tribes (Phasmatodea: "Anareolatae": Phasmatidae)". Zootaxa (Auckland, New Zealand: Magnolia Press) 1906: 1–316 pp. Oct 2008. ISSN 1175-5326. Retrieved 2008-10-16.
- Seow-Choen, F. (1995). The longest insect in the world. Malayan Nat. 48: 12.
- "World's longest insect revealed". Natural History Museum. 2008-10-16. Retrieved 2008-10-16.