Southern Bentbill

Here the details of the Southern Bentbill named bird below:

SCI Name:  Oncostoma olivaceum
Protonym:  Todirostrum olivaceum Ibis p.12
Taxonomy:  Passeriformes / Tyrannidae / Oncostoma
Taxonomy Code:  souben1
Type Locality:  Isthmus of Panama; type from Lion Hill, Canal Zone, fide Salvin and Godman, 1888, Biol. Centr.-Amer., Aves, 2, p. 15.
Author:  Lawrence
Publish Year:  1862
IUCN Status:  Least Concern

DEFINITIONS

ONCOSTOMA
(Tyrannidae; Ϯ Northern Bentbill O. cinereigulare) Gr. ογκος onkos  bulk, weight; στομα stoma, στοματος stomatos  mouth; "98. TODIROSTRUM CINEREIGULARE, sp. nov.  ...  rostro compressiusculo, crassiusculo; culmen carinato, incurvo  ...  This Todirostrum differs slightly in the form of the bill from the ordinary members of the genus, that part being rather thicker, and with the culmen elevated and more incurved than in the typical species of the group." (P. Sclater 1856); "Genus ONCOSTOMA.   1269. ONCOSTOMA CINEREIGULARE.  Todirostrum cinereigulare, Sclater, P.Z.S. 1856, p. 295." (P. Sclater 1862); "Oncostoma Sclater, 1862, Cat. Coll. Amer. Birds, p. 208. Type, by monotypy, Todirostrum cinereigulare Sclater." (Traylor in Peters 1979, VIII, 78).

olivaceum / olivaceus
Mod. L. olivaceus  olive-green, olivaceous  < L. oliva  olive.
● ex “Merle olive des grandes Indes” of d’Aubenton 1765-1781, pl. 564, fig. 1 (syn. Acritillas indica).
● ex “Oliva” of Levaillant 1801, pl. 75 (Chlorophoneus).
● ex “Crimson-breasted Woodpecker” of Latham 1782 (Geocolaptes).
● ex “Troupiale olive de Cayenne” of d’Aubenton 1765-1781, pl. 606, fig. 2, and “Cayenne Olive Oriole” of Latham 1782 (?syn. Icterus auricapillus).
● ex “White-cheeked Crow” of Latham 1801 (Psophodes).
● ex “Perroquet de l’isle de Luçon” of d’Aubenton 1765-1781, pl. 287, “Perruche aux ailes chamarées” of de Buffon 1770-1783, and “Lace-winged Parrakeet” of Latham 1781 (syn. Tanygnathus lucionensis).
● ex "Bruant de S. Domingue" of Brisson 1760 (Tiaris).
● ex “Merle olive du Cap de Bonne Espérance” of Brisson 1760 (Turdus).
● ex “Red-ey’d Fly-catcher” of Catesby 1731, “Muscicapa olivacea” of Edwards 1758, and “Muscicapa jamaicensis” of Brisson 1760 (Vireo).
● ex “Grimpereau olive de Madagascar” of Brisson 1760 (Zosterops).
● ex “Merula olivacea indica” of Brisson 1760 (unident.).