(Trochilidae; Ϯ Longuemare's Sunangel H. clarisse) Gr. ἡλιος hēlios  sun; αγγελος angelos  angel; "Genus HELIANGELUS.   Gen. char.—Rostrum rectum, æque ac caput longum, cylindraceum, et ad basin aliquanto depressum.  Plumæ frontales rostri basin non obtegentes.  Alæ mediocriter validæ primaria externa falciformi.  Pedes mediocriter validi, halluce digitum intermedium æquante.  Cauda mediocris, subrotundata.   ...   All the species of this genus are from the Andes, and distinguished by the extreme lustre of the throat, which in most of the species is bounded below by a gorget of white or buff.   Types, Trochilus Clarisse, Spencei, amethysticollis, and strophianus.   HELIANGELUS MAVORS (n. sp.)" (Gould 1848); "Heliangelus Gould, Proc. Zool. Soc. London, pt. 16, 1848, p. 12. Type, by subsequent designation, Trochilus clarissae [i.e. Ornismya clarisse] Longuemare. (G. R. Gray, Cat. Gen. Subgen. Bds., 1855, p. 22)." (Peters 1945, V, 105). 
Synon. Anactoria, Diotima, Heliotrypha, Helymus, Nodalia, Parzudakia, Peratus, Warszewiczia.   

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2019). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2019). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from www.hbw.com on 16 January 2019).