Genus Extatosoma
Identification Key

KEY TO THE SPECIES OF EXTATOSOMA (FEMALES) (Taken from Gurney, 1947)
1.	Fifth, sixth and seventh terga bearing lateral expansions which overlap when seen in dorsal view (fig. 1).	2
-	Fifth, sixth and seventh terga bearing much smaller, non-overlapping expansions (fig. 4)	bufonium
2.	A conspicuous V-shaped pale mark on mesonotum (fig. 1); metanotum and first tergum each with a pair of erect, well-developed lamellae (fig. 2); dorsal lamellae of fifth and sixth terga each occupying about one-third the length of segment, the base of each scarcely wider than apex and not extending in front of middle of segment; a compound lamellate spine on mesonotum between bases of tegmina.	popa
-	No V-shaped pale mark on mesonotum; median lamellae of metanotum and first tergum absent or weakly developed, spines occurring there either separate or weakly confluent basally; dorsal lamellae of fifth and sixth terga extending in front of middle of segment, the base of each lamella wider than the apex (fig. 3); spines at base of mesonotum individual.	tiaratum

The most significant difference, discernable at a glance, is the shape of the lateral flanges of the abdomen.

Extatosoma bufonium
Extatosoma tiaratum

Genus ExtatosomaIdentification Key