Meet Lichenagraecia cataphracta, the Queensland lichen-mimicking katydid. I noticed this subadult male on my living room window one night, while I was struggling (and failing) to concentrate on Ed Miliband's testimony to the Leveson Inquiry. The katydid was rather more successful than I was at paying attention to the proceedings. In fact, it looked positively enthralled.
This is the only species in the genus Lichenagraecia. The specific epithet cataphracta refers to the armoured cavalry of ancient armies. The spines on the body and legs probably serve double duty in warding off predators and breaking up the animal's outline. No wonder they're so difficult to spot (when they're not on a window).
Lichenagraecia cataphractus is known only from a (gloved) handful of specimens. Its range extends from Mt Lewis S to the Cardwell Range. The concentration of records on the Atherton Tablelands probably reflects the population density of zoologists and natural historians. (The type locality is a garden in Atherton, so you never know what new species might be hanging around in the back yard!)
Many thanks to David Rentz who confirmed the identity of this wonderful critter.
Rentz, D.C.F., Su, Y.N. & Ueshima, N. (2012). Studies in Australian Tettigoniidae: New genera and species from North
Queensland (Tettigoniidae; Conocephalinae; Armadillagraeciini trib. nov.
and Agraeciini; Listroscelidinae; Requenini). Zootaxa 3173: 1–36.