Proposal (93) to South American Classification Committee
Separar Myiopsitta luchsi de Myiopsitta
monachus
Este taxa es similar a Myiopsitta monachus, pero
el gris de la frente es m‡s claro y extendido hasta la mitad de la corona. El
gris p‡lido del pecho carece del efecto escalado ("caly") que le dan
los centros de las plumas oscuros. Tiene adem‡s la banda que cruza el vientre
m‡s amarillo y la barba externa de las primarias todas azules. Nidifica en
grietas (crevices) en acantilados y aparentemente tambiŽn entre bromelias
colgando de acantilados, donde construyendo un nido voluminoso de ramas
apretadas.
Esta especie fue descripta en 1868 por Finsch
como Bolborhynchus luchsi, con ejemplares procedentes de Bolivia.
Posteriormente la especie fue transferida al gŽnero Myiopsitta y el
nombre Myiopsitta luchsi fue usado aparentemente hasta 1918 por Cory. A
partir de 1943, Bond & de Schauensee ya la tratan como una subespecie de monachus
(Myiopsitta monachus luchsi), criterio que ha sido seguido por todos los
autores modernos, pero Collar (1997) finalmente considera que los caracteres
morfol—gicos y su modo de nidificar son suficientes para elevarla nuevamente a
nivel de especie.
Yo voto No a esta propuesta porque considero
que ni las diferencias morfol—gicas ni el modo de nidificar (es similar a monachus pero
adaptado al sustrato disponible en su h‡bitat) son suficientemente importantes
como para separarla como especie.
Literatura citada
Bond, J. and R. M. de
Schauensee. 1943. The birds of Bolivia. Part 2. Acad. Nat. Sci. Philadelphia.
Cory, Ch. 1918.
Catalogue of birds of the Americas. Chicago. Collar, N. 1997. Handbook of the
birds of the world.
Manuel Nores, January 2004
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Comments from Remsen: "NO. I agree with Manuel that the
difference in nest location (luchsi nests on cliffs), emphasized by
Collar's English name "Cliff Parakeet," merely reflect a habitat
difference; furthermore, lowland monachus itself nests on telephone
poles and other structures (in addition to trees) that would seem roughly
equivalent to cliff ledges. More intriguing is the difference in nest structure
(single-pair nests in luchsi, communal nests in lowland monachus),
although the difference seems less, as I read it, than it first might appear: luchsi
nests are evidently jammed in next to one another, and such cliff ledges might
not have sufficient room for a larger communal nest; also Collar noted that
lowland monachus is sometimes a solitary nester; therefore, it is
unclear to me whether the differences really represent a hard-wired fixed
genetic difference. As for plumage, may taxa of Bolivia's dry montane valleys
differ in plumage from their lowland relatives at least as much as in these parakeets
yet are treated as conspecific. e.g., Thamnophilus caerulescens, Lepidocolaptes
angustirostris. What I need for a YES vote on this is data on voice or on
details of nest structure that confirm fundamental differences."
Comments from Stiles: "NO I agree that the differences cited do
not a species make, at least without more hard data!"
Comments from Robbins: "NO, more information on a number of
aspects is needed before recognizing "luchsi"
as a species."
Comments from Zimmer: "NO. Evidence here is suggestive, but
still too weak for my liking."
Comments from Jaramillo: "NO. I bet that in the end this form will be
elevated to species status, based on good data, it is a gut feeling. However,
right now the data is entirely lacking, so it is premature to split this taxon
from monachus."