(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.

Gr. κυανος kuanos  dark-blue; λαιμος laimos  throat.

(syn. Lampornis Ϯ Blue-throated Hummingbird L. clemenciae) Gr. κυανος kuanos  dark-blue; λαιμος laimos  throat; "The species upon which Cœligena was originally based (Ind. & Synop. gén. Troch., 1832, p. XVIII), included Ornismyia cœligena Lesson, which by tautonomy is the type. Unfortunately Lampropygia Reich. has been used for this bird and its allies and Cœligena for O. clemenciæ. Replacing Reichenbach's name with Cœligena, we leave O. clemenciæ without a generic appellation and I propose Cyanolæmus,¹  type Ornismyia clemenciæ Lesson.   ...  ¹ κυανεος blue, λαιμος throat." (Stone 1907).   Var. Cyanolaema.