Belongs within: Thraupidae.
Thlypopsis is a genus of small, slender-billed tanagers with orange to chestnut coloration on the head in males (Hilty 2011).
<==Thlypopsis Cabanis 1851H11
|--T. sordida (d’Orbigny & Lafresnaye 1837)JT12, H11 [=Nemosia sordidaH11]
| |--T. s. sordidaH11
| |--T. s. chrysopis (Sclater & Salvin 1880)H11
| `--T. s. orinocensis Friedmann 1942H11
`--+--T. ruficeps (d’Orbigny & Lafresnaye 1837)JT12, H11 [=Sylvia ruficepsH11]
`--Pyrrhocoma Cabanis 1851JT12, H11
`--P. ruficeps (Strickland 1844) [=Tachyphonus ruficeps]H11
Thlypopsis incertae sedis:
T. fulviceps Cabanis 1851H11
|--T. f. fulvicepsH11
|--T. f. intensa Todd 1917H11
|--T. f. meridensis Phelps & Phelps 1962H11
`--T. f. obscuriceps Phelps & Phelps 1953H11
T. inornata (Taczanowski 1879) [=Nemosia inornata]H11
T. ornata (Sclater 1859) [=Nemosia ornata]H11
|--T. o. ornataH11
|--T. o. macropteryx Berlepsch & Stolzmann 1896H11
`--T. o. media Zimmer 1930H11
T. pectoralis (Taczanowski 1884) [=Nemosia pectoralis]H11
*Type species of generic name indicated
References
[H11] Hilty, S. L. 2011. Family Thraupidae (tanagers). 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. 46–329. Lynx Edicions: Barcelona.
[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.