Black-bellied Thorntail

SCI Name:  Discosura langsdorffi
Protonym:  Trochilus langsdorffi Pl.Col. livr.11 pl.66 fig.1
Taxonomy:  Caprimulgiformes / Trochilidae / Discosura
Taxonomy Code:  bkbtho1
Type Locality:  Brazil.
Author:  Temminck
Publish Year:  1821
IUCN Status:  Least Concern

DEFINITIONS

DISCOSURA
(Trochilidae; Ϯ Racquet-tailed Coquette D. longicauda) Gr. δισκος diskos  plate; ουρα oura  tail. "The tail above, greenish brown, beneath of reddish or yellowish white. The feathers, excepting the two outer ones, are pointed, and assume a slightly forked form. The two on the outside exceed the others by about half their own length, and the shafts commence to be entirely bare where they exceed the length of the others, and are finished by a nearly round tip of black plume in the form of a racket-board" (Jardine 1833); "*198. Discosura, Bp. (Platurus, p. Less. - Mellisuga, p. Gr.)  America m.  2.    1. TROCHILUS longicaudus, Gm. (platurus, Lath.) Vieill. Ois. dor. t. 60. - Less. Ois.-Mouch. t. 40.  ex Gujana.    2. TROCHILUS ligonicaudus, Gould, (Ocreatus! ligonicaudus, Gould.) Pr. Zool. Soc. 1846.  ex Brasil." (Bonaparte 1850); "Discosura Bonaparte, Consp. Av., 1, Mar., 1850, p. 84. Type, by subsequent designation, Trochilus longicaudus Gmelin. (G. R. Gray, Cat. Gen. Subgen. Bds., 1855, p. 22.)" (Peters, 1945, V, p. 35).   
Synon. Discura, Gouldia, Gouldomyia, Mytinia, Platurus, Popelairia, Prymnacantha, Tricholopha.

langsdorffi / langsdorffii / langsdorfi
Dr Georg Heinrich Freiherr von Langsdorff (1774–1852) Prussian statesman, naturalist, collector in Japan and Alaska 1803-1807, Russian and Prussian Consul to Brazil 1813–1830 (Discosura, syn. Eleothreptus candicans, Selenidera).

SUBSPECIES

Black-bellied Thorntail (melanosternon)
SCI Name: Discosura langsdorffi melanosternon
melanosterna / melanosternon / melanosternus
Gr. μελας melas, μελανος melanos  black; στερνον sternon  breast (cf. μελανστερνος melansternos black-breasted).

Black-bellied Thorntail (langsdorffi)
SCI Name: Discosura langsdorffi langsdorffi
langsdorffi / langsdorffii / langsdorfi
Dr Georg Heinrich Freiherr von Langsdorff (1774–1852) Prussian statesman, naturalist, collector in Japan and Alaska 1803-1807, Russian and Prussian Consul to Brazil 1813–1830 (Discosura, syn. Eleothreptus candicans, Selenidera).