Heterogastridae, Stal, 1872

Ban, Teruaki, 2018, The lygaeoid bug family Heterogastridae (Hemiptera: Heteroptera: Lygaeoidea) from Laos and Thailand, with descriptions of three new species, Zootaxa 4446 (1), pp. 51-67 : 52

Key to genera of Heterogastridae from Laos, Thailand and and adjoining countries

1 Body length less than 5.5 mm; scutellum without longitudinal or Y-shaped carina................................... 2

- Body length more than 5.8 mm; scutellum with longitudinal or Y-shaped carina.................................... 3

2 Posterior part of pronotum with a distinct raised central line............................................ Boccharus

- Posterior part of pronotum without a distinct raised central line.......................................... Sadoletus

3 Body length more than 4.5 times as long as pronotal width; labium attaining anterior margin of mesothorax; pronotum with a deep transverse impression; hemelytra and abdomen constricted at middle; apical quarter of metafemora swollen...................................................................................................... Artemidorus

- Body length less than 4.3 times as long as pronotal width; labium attaining at least mesocoxae; pronotum without a deep transverse impression; hemelytra and abdomen not constricted; apical quarter of metafemora not swollen.................... 3

4 Scutellum without Y-shaped carina, only pale longitudinal line at middle; profemur without annulations............ Nerthus

- Scutellum with Y-shaped carina; profemur usually with annulations.............................................. 5

5 Body length more than 4.0 times as long as pronotal width; head rounded anteriorly; paraclypeal lobes distinctly carinate; tibiae usually without annulations................................................................. Parathyginus

- Body length less than 4.0 times as long as pronotal width; head pointed anteriorly; paraclypeal lobes not carinate; tibiae with brown annulations..................................................................................... 6

6 Corium usually with markings; posterior lobe of pronotum less than 1.5 times as wide as anterior lobe.......... Dinomachus

- Corium usually without markings; posterior lobe of pronotum more than 1.5 times as wide as anterior lobe........ Hyginus