Phryganistria heusii (Hennemann & Conle) is the name of a stick insect or phasmatid. The species was only recently described from Vietnam. The male holotype is, thanks to Frank Hennemann and Oskar Conle, housed in the ZSM and is, with a body length of 22.5 cm (47 cm with legs stretched out), the largest known male insect specimen.
Stick insects are giants among insects. The largest species and in fact the longest known insect is a stick insect: Chan’s megastick (Phobaeticus chaini Bragg) from Malaysia was described only last year and reaches a body length of 35.7 cm and a total length (with legs stretched out) of 56.7 cm. Phobaeticus serratipes (Gray) from West Malaysia has a length of 55.5 cm with the legs stretched out.
See also: Phasmatodea.com