Belongs within: Thraupidae.
Oryzoborus, seed finches, is a genus of finch-like tanagers with large, heavy bills.
<==Oryzoborus Cabanis 1851RJ11
| i. s.: O. atrirostris Sclater & Salvin 1878RJ11
| |--O. a. atrirostrisRJ11
| `--O. a. gigantirostris Bond & Meyer de Schauensee 1939RJ11
| O. nuttingi Ridgway 1884RJ11
|--+--O. angolensis (Linnaeus 1766)JT12, RJ11 [=Loxia angolensisRJ11]
| | |--O. a. angolensisRJ11
| | `--O. a. torridus (Scopoli 1769)RJ11
| `--O. funereus Sclater 1860JT12, RJ11 [=O. angolensis funereusRJ11]
| |--O. f. funereusRJ11
| |--O. f. aethiops Sclater 1860RJ11
| |--O. f. ochrogyne Olson 1981RJ11
| `--O. f. salvini Ridgway 1884RJ11
`--+--O. crassirostris (Gmelin 1789)JT12, RJ11 [=Loxia crassirostrisRJ11]
| |--O. c. crassirostrisRJ11
| `--O. c. occidentalis Sclater 1860RJ11
`--O. maximiliani Cabais 1851JT12, RJ11
|--O. m. maximilianiRJ11
`--O. m. magnirostris Phelps & Phelps 1950 [incl. Sporophila maximiliani parkesi]RJ11
*Type species of generic name indicated
References
[JT12] Jetz, W., G. H. Thomas, J. B. Joy, K. Hartmann & A. Ø. Mooers. 2012. The global diversity of birds in space and time. Nature 491: 444–448.
[RJ11] Rising, J. D., A. Jaramillo, J. L. Copete, P. G. Ryan & S. C. Madge. 2011. Family Emberizidae (buntings and New World sparrows). In: Hoyo, J. del, A. Elliott & D. A. Christie (eds) Handbook of the Birds of the World vol. 16. Tanagers to New World Blackbirds pp. 428–683. Lynx Edicions: Barcelona.