Variable Antshrike

Here the details of the Variable Antshrike named bird below:

SCI Name:  Thamnophilus caerulescens
Protonym:  Thamnophilus caerulescens Nouv.Dict.Hist.Nat. 3 p.311
Taxonomy:  Passeriformes / Thamnophilidae / Thamnophilus
Taxonomy Code:  varant1
Type Locality:  Paraguay.
Author:  Vieillot
Publish Year:  1816
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.

caerulescens
Unattested L. caerulescens, caerulescentis  bluish (neither caerulescere nor caerulescens have been found in Classical Latin, but their existence may be inferred from caeruleus  azure-blue, by the example, amongst others, of rufus  red, ruddy, giving rufescere  to become reddish, and rufescens  reddish).
● "61. ANAS.  ...  cærulescens.  10. A. grisea, subtus alba, tectricibus alarum dorsoque postico cærulescentibus.  Anser canadensis, alis cæruleis. Edw. av. 152. t. 152.  Habitat in Canada." (Linnaeus 1758) (Anser).
● "43. LANIUS.  ...  cærulescens.  8. L. cauda forficata, corpore nigro cærulescente, abdomine albo.  Lanius cauda forcipata. Edv. av. 96. t. 56.  Habitat in Benghala." (Linnaeus 1758) (Dicrurus).
● ex “Héron bleuâtre de Cayenne” of d’Aubenton 1765-1781, “Crabier bleu à cou brun” of de Buffon 1770-1785, and “Blue Heron” of Latham 1785 (syn. Egretta caerulea).
● ex “Blue Roller” of Latham 1785 (syn. Eurystomus glaucurus).
● "41. FALCO.  ...  cærulescens.  7. F. cera palpebris pedibus subtusque luteus, dorso nigro-cærulescente, temporibus linea alba inclusis.  Accipiter minimus benghalensis. Edv. av. 108. t. 108.  Habitat in Asia." (Linnaeus 1758). This epithet is the thirteenth name in avian nomenclature. (Microhierax).
● ex "Oiseau bleu" of Dubois 1671, and "Gros oiseau" of Brown 1724 (‡Porphyrio).
● ex “Blue-necked Rail” of Latham 1785 (Rallus).
● ex "Fauvette bleuâtre de S. Domingue" of de Buffon 1770-1783, and "Blue-grey Warbler" of Latham 1783 (Setophaga).
● ex “Batara negro y aplomado” of de Azara 1802-1805, no. 213 (Thamnophilus).
● ex “Caerulean Creeper” of Latham 1801 (syn. Zosterops lateralis).

SUBSPECIES

Variable Antshrike (melanochrous)
SCI Name: Thamnophilus caerulescens melanochrous
melanochroa / melanochrous
Gr. μελανοχρους melanokhrous  swarthy  < μελας melas, μελανος melanos  black; χροα khroa, χροας khroas  colour, appearance  < χρως khrōs,  χρωτος khrōtos  complexion.

Variable Antshrike (aspersiventer)
SCI Name: Thamnophilus caerulescens aspersiventer
aspersiventer
L. aspersus  sprinkled  < aspergere  to sprinkle upon  < spargere  to sprinkle; venter, ventris  belly.

Variable Antshrike (dinellii)
SCI Name: Thamnophilus caerulescens dinellii
dinelliana / dinellianus / dinellii
Luigi M. Dinelli (1866-1939) Italian naturalist, immigrated to Argentina 1892, collector (Paul Scofield in litt.) (syn. Aeronautes andecolus, Pseudocolopteryx, subsp. Thamnophilus caerulescens).

Variable Antshrike (paraguayensis)
SCI Name: Thamnophilus caerulescens paraguayensis
paraguayae / paraguayensis
Paraguay.

Variable Antshrike (gilvigaster)
SCI Name: Thamnophilus caerulescens gilvigaster
gilvigaster
L. gilvus  pale yellow; gaster, gasteris  belly.

Variable Antshrike (caerulescens)
SCI Name: Thamnophilus caerulescens caerulescens
caerulescens
Unattested L. caerulescens, caerulescentis  bluish (neither caerulescere nor caerulescens have been found in Classical Latin, but their existence may be inferred from caeruleus  azure-blue, by the example, amongst others, of rufus  red, ruddy, giving rufescere  to become reddish, and rufescens  reddish).
● "61. ANAS.  ...  cærulescens.  10. A. grisea, subtus alba, tectricibus alarum dorsoque postico cærulescentibus.  Anser canadensis, alis cæruleis. Edw. av. 152. t. 152.  Habitat in Canada." (Linnaeus 1758) (Anser).
● "43. LANIUS.  ...  cærulescens.  8. L. cauda forficata, corpore nigro cærulescente, abdomine albo.  Lanius cauda forcipata. Edv. av. 96. t. 56.  Habitat in Benghala." (Linnaeus 1758) (Dicrurus).
● ex “Héron bleuâtre de Cayenne” of d’Aubenton 1765-1781, “Crabier bleu à cou brun” of de Buffon 1770-1785, and “Blue Heron” of Latham 1785 (syn. Egretta caerulea).
● ex “Blue Roller” of Latham 1785 (syn. Eurystomus glaucurus).
● "41. FALCO.  ...  cærulescens.  7. F. cera palpebris pedibus subtusque luteus, dorso nigro-cærulescente, temporibus linea alba inclusis.  Accipiter minimus benghalensis. Edv. av. 108. t. 108.  Habitat in Asia." (Linnaeus 1758). This epithet is the thirteenth name in avian nomenclature. (Microhierax).
● ex "Oiseau bleu" of Dubois 1671, and "Gros oiseau" of Brown 1724 (‡Porphyrio).
● ex “Blue-necked Rail” of Latham 1785 (Rallus).
● ex "Fauvette bleuâtre de S. Domingue" of de Buffon 1770-1783, and "Blue-grey Warbler" of Latham 1783 (Setophaga).
● ex “Batara negro y aplomado” of de Azara 1802-1805, no. 213 (Thamnophilus).
● ex “Caerulean Creeper” of Latham 1801 (syn. Zosterops lateralis).

Variable Antshrike (ochraceiventer)
SCI Name: Thamnophilus caerulescens ochraceiventer
ochraceiventer / ochraceiventris
Mod. L. ochraceus  ochraceous  < L. ochra  ochre  < Gr. ωχρα ōkhra  yellow ochre; L. venter, ventris  belly.

Variable Antshrike (cearensis)
SCI Name: Thamnophilus caerulescens cearensis
cearae / cearensis
Ceará, Brazil.