(Trochilidae; Ϯ Andean Hillstar O. estella) Gr. ορος oros, ορεος oreos  mountain (i.e. Bolivian Andes) ; genus Trochilus Linnaeus, 1758, hummingbird; "Genus OREOTROCHILUS, n. g.  Rostrum capite longius, subcylindricum, apulo incurvum.  Alæ subgrandes valentes.  Cauda magna, rotundata, rectricibus attenuatis, submucronatis, rigidis.  Pedes fortes.  Digitus et unguis postici digito et ungui mediis longitudine æquales.  Tarsi plumis vestiti.  Gula luminosa infra torquata.   ...  I propose this term as a generic appellation for a section of the Trochilidæ, which has hitherto only been found immediately beneath the line of perpetual congelation, where they feed upon the insects which resort to the newly expanded flowers.  The type is  Sp. 1. OREOTROCHILUS ESTELLA.  Orthorhynchus Estella, D'Orb. Voy. Am. Birds, pl. 6. fig.1.  ...  O. Ceciliæ, Less. Rev. Zool. 1839, p. 43.    Sp. 2. OREOTROCHILUS LEUCOPLEURUS, sp. nov.   ...   Sp. 3. OREOTROCHILUS CHIMBORAZO.  T. Chimborazo, Bourc. in Rev. Zool. Sept. 1846, p. 305.    Sp. 4. OREOTROCHILUS ADELA.  Orthorhynchus Adela, D'Orb. Voy. Am. Birds, pl. 61. fig. 2   ...   Sp. 5. OREOTROCHILUS MELANOGASTER, sp. nov." (Gould 1847).
Var. Orotrochilus ("OROTROCHILUS  ...  Da Oreotrochilus als sechssylbiges Wort nicht anwendbar, verkürzen wir dasselbe Analogie von οροσπιζης u.a. in Orotrochilus" (Cabanis & Heine 1860)), Oriotrochilus.   
Synon. Alcidius, Gnaphocercus.

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2018). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2018). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from www.hbw.com on 12 December 2018).