Key to genera:

Notes: The following key has been orignally derived from the key given by Kumar and Gaury (1970), and modified to be used in the Tessaratomidae online catalog. It excludes the genus Aurungabada Distant, 1906, which I believe to be a very teneral Pentatomidae. It should probably also exclude Megadoeum Karsh, 1895 which, mainly due to the conformation of the vesica of the phallus, but also to the shape of its scutellum, should probably be migrated to Dinodoridae.

1	Rostrum reaching abdomen, post-frenal part of scutellum very large, about one third of scutellum width	Megadoeum Karsh
	Rostrum reaching at most middle of mesosternum, post-frenal part of scutellum much smaller, about one tenth of scutellum width	2
2	Apex of posterior trochanter armed with a strong spine	Serrocarpona Blöte
	Posterior trochanter unarmed	3
3	Margins of fifth abdominal segment greatly ampliated laterally, angular	Dalcantha Amyot & Serville
	Margins of fith abdominal segment not specially ampliated laterally nor angular	4
4	Metasternum with an elevated plate between meso- and metacoxae	5
	No elevated plate on metasternum	10
5	meso and metacoxae widely separated, distance between metacoxae greater than distance between the eyes	Origanaus Distant
	Coxae closer, distance between metacoxae much smaller than distance between the eyes	6
6	pronotum produced forward, antero-lateral margin either angular or broadly rounded, 7th abdominal segment angularly produced backwards.	7
	Pronotum rounded, if somewhat produced or angular, then apex of abdomen rounded	8
7	Apex of metafemur with two  spines around tibia insertion	Asiarcha Stål
	Metafemur unarmed, with at most small knobs	Pseudopycanum Bergroth
8	metacoxae contiguous, metasternal elevation week	Eusthenimorpha Yang
	metacoxae separated by the metasternal elevation, which is about as high as coxae	9
9	Meso- and matafemur with a pair of spines around tibai insertion	Eusthenes Laporte
	Femora unarmed	Mattiphus Amyot & Serville
10	Posterior femora recurved	Carpona Dohrn
	Posterior femora straight	11
11	Post frenal part of scutellum large, broadly rounded	Megadoeum  Karsh
	Post frenal part of scutellum small, narrowly rounded	12
12	Abdomen broadly rounded, connexivum festooned, with large yellowish spots	Candace Distant
	Abdomen not so	13
13	Shape quadrangular	Sanganus Distant
	Shape ovoid	14
14	Male metafemora strongly incrassated and near base longly spined	Eurostus Dallas
	Male metafemora neither incrassated nor longly spined near base	Pycanum Amyot & Serville