I. Didymocheton Blume, Bijdr. Fl. Ned. Ind.: 177. 1825 ≡

Dysoxylum subg. Didymocheton (Blume) Hook.f. in Bentham & Hooker, Gen. Pl. 1: 333. 1862 ≡ Dysoxylum sect. Didymocheton (Blume) Miq. in Ann. Bot. Lugduno-Batavi 4: 8. 1868 – Type: Didymocheton nutans Blume.

= Hartighsea A. Juss. in Bull. Sci. Nat. Géol. 23: 237. 1830 ≡ Dysoxylum subg. Hartighsea (A.Juss.) Hook.f. in Bentham & Hooker, Gen. Pl. 1: 333. 1862 – Type not indicated.

= Cambania Comm. ex M.Roem., Fam. Nat. Syn. Monogr. 1: 83, 102. 1846 – Type: Cambania fraseriana (A.Juss.) M.Roem. ≡ Didymocheton fraserianus (A.Juss.) Mabb. & Hauenschild.

= Macrochiton M.Roem., Fam. Nat. Syn. Monogr. 1: 84, 104. 1846 – Type not indicated.

= Meliadelpha Radlk. in Sitzungsber. Math.-Phys. Cl. Königl. Bayer. Akad. Wiss. München 20: 331. 1891 – Type: Meliadelpha oceanica (W.Bull) Radlk. = Didymocheton bijugus (Labill.) Holzmeyer & Mabb.

Distribution. – Forty-three species, Indo-Pacific, almost all east of Wallace’ s Line, to Tonga, with particularly high endemism in New Guinea, New Caledonia and Fiji, which distribution greatly contrasts with those of all the other genera considered here.

Note. – The generic name has often been treated as neuter, but it is masculine, like the contemporary Chisocheton Blume.