Sooretama Slaty-Antshrike

Here the details of the Sooretama Slaty-Antshrike named bird below:

SCI Name:  Thamnophilus ambiguus
Protonym:  [Thamnophilus naevius] var. a? T. ambiguus Zool.J. 2 p.91
Taxonomy:  Passeriformes / Thamnophilidae / Thamnophilus
Taxonomy Code:  soosla1
Type Locality:  Minas Gerais; Hellmayr considers the type locality to be in the vicinity of Campos, on the border between the states of Minas Gerais and Rio de Janeiro.
Author:  Swainson
Publish Year:  1825
IUCN Status:  Least Concern

DEFINITIONS

THAMNOPHILUS
(Thamnophilidae; Ϯ Barred Antshrike T. doliatus) Gr. θαμνος thamnos  bush; φιλος philos  lover; "BATARA (DE AZARA), Thamnophilus.  Lanius, Turdus, Lin. Gm. Lath.  Bec droit à la base, robuste, convexe en dessus, comprimé latéralement; mandibule supérieure échancrée, ou dentée, et crochue vers le bout; l'inférieure entaillée, aiguë et retroussée à la pointe. — Bouche ciliée. Ailes courtes arrondies.  Esp. Pie-Grièche rayée. — Fourmillier huppé, Buff.   ...   Tamnophilus [ταμνος, frutex, φιλεω, gaudeo]." (Vieillot 1816); "Thamnophilus Vieillot, Analyse, 1816, p. 40. Type, by subsequent designation, Lanius doliatus Linné (Swainson, Zool. Journ., 1, 1824, p. 301)." (Peters 1951, VII, 162).
Var. Thamnoplius, Tamnophilus.   
Synon. Abalius, Erionotus, Rhopochares.

thamnophilus
Gr. θαμνος thamnos  bush; φιλος philos  loving  < φιλεω phileō  to love  < φιλος philos  lover.

ambigua / ambiguum / ambiguus
L. ambiguus  doubtful, uncertain  < ambigere  to doubt  < preposition  ambi-  around; agere  to set in motion.
● ex “Grand Ara militaire” of Levaillant 1801, who was uncertain as to whether the Great Green Macaw was distinct from the Military Macaw A. militaris or just a constant variety (Ara).
● Despite an apparent series of transitional specimens between the Black-headed Greenfinch and the Oriental Greenfinch C. sinica, Oustalet 1896, still believed them to be two distinct spp. (Chloris).
● “Similar to S. r. rufifrons  ...  Distribution, — Probably Sikhim, Butan Duars, Assam, Naga Hills and Manipur” (Harington 1915) (subsp. Cyanoderma rufifrons).
● “While it is practically certain that this new bird is a conspecies of M. sclateri, the wide gap in the distribution of the two forms with no close relative known from the intervening area makes me hesitate to unite them at present” ( J. Zimmer 1932) (Myrmotherula).
● “Doubtful Toucan ... The species now selected is one I have never seen; but I have no doubt of its existence, and little of the accuracy of its delineation” (Swainson 1823) (Ramphastos).
● “This Bird is very nearly related to Trog. elegans ... These distinctions, although apparently trivial, having been observed ... in many specimens ... he is induced to regard the two Birds as being, very probably, specifically distinct” (Gould 1835) (Trogon).