The Key to Scientific Names
- Stenopsis
(Caprimulgidae; syn. Hydropsalis † White-tailed Nightjar H. cayennensis) Gr. στηνος stēnos narrow, thin; οψις opsis appearance; "5. Genus Stenopsis, nobis, nov. gen. Bill longer than typical Caprimulgus, tapering and depressed; upper mandible with about six or seven pairs of bristles, which are very rigid at their bases, but very slender and curved at their tips ... Another exclusively American genus, the bill in which very considerably resembles that of Hydropsalis. The species which I have seen are: 1. Stenopsis cayennensis, (Gm.) ... 2. Stenopsis longirostris, (Bonap.) ... 3. Stenopsis parvulus, (Gould.)" (Cassin 1851); "Stenopsis Cassin, 1851, Proc. Acad. Nat. Sci. Philadelphia, V (viii), p. 179 (not of Rafinesque, 1815 (Coleoptera)). Type, by subsequent designation (Hartlaub, 1852, Archiv für Naturgesch., XVIII (2), p. 19), C. cajennensis Gm., i.e. Caprimulgus cayennensis Gmelin, 1789." (JAJ 2021).
