Blue-crowned Parakeet

Here the details of the Blue-crowned Parakeet named bird below:

SCI Name:  Thectocercus acuticaudatus
Protonym:  Psittacus acuticaudatus Nouv.Dict.Hist.Nat.(1817) (1817), 25 p.369
Taxonomy:  Psittaciformes / Psittacidae / Thectocercus
Taxonomy Code:  bucpar
Type Locality:  Paraguay in lat. 24° S., ex Azara no. 278.
Author:  Vieillot
Publish Year:  1818
IUCN Status:  Least Concern

DEFINITIONS

Thectocercus
(syn. Psittacara Ϯ Blue-crowned Parakeet P. acuticaudatus) Gr. θηκτος thēktos  sharp  < θηγω thēgō  to sharpen; κερκος kerkos  tail; "Thectocercus gen. nov.  Type, Psittacus acuticaudatus Vieillot.  Differing from Conurus Kuhl in having the maxilla swollen laterally, much wider than deep at base, broadly arched in transverse section, its tip attenuated, acute, and ridged; feathers of cheeks narrow, distinctly outlined, cere naked behind nostrils, and inner webs of rectrices mostly red.  (Θηκτος, sharp; κερκος, tail.)" (Ridgway 1912).

acuticaudata / acuticaudatus
L. acutus  sharp-pointed  < acuere  to sharpen to a point; -caudatus  -tailed  < cauda  tail.
● ex “Maracana cabeza azulada” of de Azara 1802-1805, no. 278 (Psittacara).

SUBSPECIES

Blue-crowned Parakeet (Blue-crowned)
SCI Name: Thectocercus acuticaudatus [acuticaudatus Group]
Thectocercus
(syn. Psittacara Ϯ Blue-crowned Parakeet P. acuticaudatus) Gr. θηκτος thēktos  sharp  < θηγω thēgō  to sharpen; κερκος kerkos  tail; "Thectocercus gen. nov.  Type, Psittacus acuticaudatus Vieillot.  Differing from Conurus Kuhl in having the maxilla swollen laterally, much wider than deep at base, broadly arched in transverse section, its tip attenuated, acute, and ridged; feathers of cheeks narrow, distinctly outlined, cere naked behind nostrils, and inner webs of rectrices mostly red.  (Θηκτος, sharp; κερκος, tail.)" (Ridgway 1912).

Blue-crowned Parakeet (Highland)
SCI Name: Thectocercus acuticaudatus neumanni
neumanni / neumanniana / neumannianus
Prof. Oskar Rudolph Neumann (1867-1946) German ornithologist, explorer and collector in East Africa 1892-1899, Associate at Tring Mus. 1908-1931 (syn. Alcedo leucogaster bowdleri, syn. Anthreptes orientalis, syn. Anthus similis hararensis, subsp. Anthus vaalensis, syn. Apalis flavida flavocincta, Arizelocichla, subsp. Bradornis microrhynchus, syn. Campethera nubica, syn. Cecropis semirufa gordoni, subsp. Centropus leucogaster, syn. Certhia brachydactyla, syn. Cisticola hunteri, syn. Euplectes axillaris phoeniceus, subsp. Gallinula tenebrosa, subsp. Galerida cristata, Hemitesia, subsp. Lophoceros pallidirostris, subsp. Melierax metabates, syn. Muscicapa adusta minima, subsp. Muscicapa striata (ex Muscicapa grisola sibirica Neumann, 1900), syn. Numida meleagris, subsp. Oenanthe melanura (ex Cercomela melanura erlangeri Neumann & von Zedlitz, 1913), Onychognathus, syn. Passer griseus swainsonii, subsp. Phonygammus keraudrenii, subsp. Ploceus baglafecht, syn. Prionops retzii graculina, subsp. Psittacara acuticaudatus, subsp. Ptilinopus solomonensis, subsp. Ptilorrhoa caerulescens, syn. Pyrenestes ostrinus, subsp. Terpsiphone rufiventer, subsp. Vidua chalybeata).