Orthognathini, Lacordaire, 1866

Morrone, Juan J. & Cuevas, Perla I., 2009, On the status of the tribes Orthognathini and Rhinostomini (Coleoptera: Curculionidae: Dryophthorinae), Zootaxa 2216 (1), pp. 57-63 : 59

Key to the subtribes and genera of Orthognathini

1. Mandibles curving outwards; pronotum lacking postocular lobes (feeble in R. frontalis ); tarsite 3 bilobed ................ ......................................................................................................................................... Rhinostomina (Rhinostomus)

–. Mandibles not curving outwards; pronotum with well-developed postocular lobes; tarsite 3 narrow, linear ............... .......................................................................................................................................................... Orthognathina ... 2

2. Mandibles as wide as long; elytra oblong-oval; suture between ventrites 1 and 2 slightly arcuate; Old World ........... ........................................................................................................................................................................ Sipalinus

–. Mandibles wider than long; elytra elongate; suture between ventrites 1 and 2 straight; New World ......................... 3

3. Antennal scape longer than funicle; rostrum dorsally smooth or with a single, inconspicuous carina; hind tibiae long, relatively narrow, with apex not wider than base, but if slightly so, apical truncation narrow, not wider than tarsal article 2..................................................................................................................................................... Mesocordylus

–. Antennal scape shorter than funicle; rostrum dorsally bicarinate or multicarinate; hind tibiae robust, with apex at least twice width of base, with apical truncation wider than tarsal article 2 ........................................... Orthognathus