Subfamily Eurycanthinae Identification Key

The following table is from Gurney, A.B. (1947). Notes on some remarkable Australasian walkingsticks, including a synopsis of the Genus Extatosoma (Orthoptera: Phasmatidae). Annals of the Entomological Society of America. 40(3): 373-396. .

1.	Supra-anal plate and subgenital plate of female each prolonged to form an elongate ovipositor case	2
-	Supra-anal plate of female not prolonged; subgenital plate prolonged or not	3
2.	Vestigial tegmina present (New Caledonia, Loyalty Islands, New Hebrides),	Canachus
-	Tegmina entirely absent (New Guinea, Bismarck Archipelago, Australia, New Caledonia, Solomon Islands	Eurycantha
3.	Subgenital plate of female not extending posterior to apical tergum; mesonotum twice as long as the greatest width and tapering anteriorly; hind tibia as long as hind femur; major ventral spines of hind femur of male borne along the midventral carina (New Guinea)	Thaumatobactron
-	Subgenital plate of female prolonged posterior to apical tergum; mesonotum less than twice as long as greatest width and scarcely or not at all tapering anteriorly; hind tibia distinctly shorter than hind femur; major ventral spines of hind femur of male borne along ventroexternal carina (Lord Howe Island)	Dryococelus