Small-billed Elaenia

Here the details of the Small-billed Elaenia named bird below:

SCI Name:  Elaenia parvirostris
Protonym:  Elainea parvirostris Orn.Brasil. Abth.2 p.107,178
Taxonomy:  Passeriformes / Tyrannidae / Elaenia
Taxonomy Code:  smbela1
Type Locality:  Curitiba, Borba, and Barcelos, Brazil; type from Curitiba, Parana, fide Hellmayr, 1927, Field Mus. Nat. Hist., Zool. Ser., 13, pt. 5, p. 415.
Author:  von Pelzeln
Publish Year:  1868
IUCN Status:  Least Concern

DEFINITIONS

ELAENIA
(Tyrannidae; Ϯ Yellow-bellied Elaenia E. flavogaster) Gr. ελαινεος elaineos  of olive-oil, oleaginous  < ελαια elaia  olive; "Elænia n. g. ⁶)  Musc. pagana Licht.; brevirostris, — modesta, — aurifrons Pr. Max; — Hylophilus cinerascens ejusd.  Numerosæ americanæ, transitum ad Tyrannides præbentes; Fringillis subsimiles.   ...    ⁶) Rostrum crassiusculum, breve, basi dilatatum, altitudine latius; carina dorsali subacuta, sutura recta.  Membrana narium plumulis tecta.  Vibrissæ tenues.  Alæ mediocres vel sub-breves, rotundatæ, remigib. 3-5 reliqvis longioribus.  Pedes mediocres, digitis brevibus, subliberis.  Olivaceæ-cinerascentes; sæpe subtus, interdum vertice flavæ. — Eλαινιος, oleagineus." (Sundevall 1836); "Elaenia Sundevall, 1836, Vetensk. Akad. Handl., 1835, p. 89. Type, by subsequent designation (Gray, 1855, Cat. Gen. Subgen. Birds, p. 49), Muscicapa pagana Lichtenstein = Pipra flavogaster Thunberg." (Traylor in Peters, 1979, VIII, pp. 26-27).  
Var. Elaenea, Elainea, Elainia, Eloenia, Elana, Elania.

parvirostris
L. parvus  small; -rostris  -billed  < rostrum  beak.
● ex “Pato pico pequeño” of de Azara 1802-1805, no. 432 (syn. Anas sibilatrix).
● "54.  Tetrao, L.   141. urogallus, L.  (major, Br.  crassirostris, Brehm.  hybridus, L. cum Lyr. tetrice.  medius, Leisl.  intermedius, Langsd.  pseudourogallus, Brehm.  maculatus, Brehm.  urogalloides, Nilss.)   142. parvirostris, Bp.  (urogalloides, Middend.)" (Bonaparte 1856).  According to Mlíkovsky 2012, "the Black-billed Capercaillie should be called Tetrao urogalloides Middendorff, 1853, not Tetrao parvirostris Bonaparte, 1856." (syn. Tetrao urogalloides).