Ulrich Schulz & Knut Eisermann. Morphometric differentiation between subspecies of Resplendent Quetzal (
Pharomachrus mocinno mocinno and
P. m. costaricensis) based on uppertail-coverts. Bull. B.O.C. 2017 137(4).
Summary.—Resplendent Quetal
Pharomachrus mocinno is endemic to montane
cloud forests of Middle America. Disjunct populations in the highlands north
(southern Mexico and northern Central America) and south of the lowlands of
Nicaragua (Costa Rica and Panama) have been recognised subspecifcally by
several authorities (e.g. Ridgway 1911, Cory 1919, Dickinson & Remsen 2013, Gill
& Donsker 2017), but have also been suggested to merit species status (Solórzano
& Oyama 2010). We present morphometric diferences in the elongated uppertailcoverts
of adult males. We analysed width and length of the uppertail-coverts of
73 adult male specimens in European ornithological collections. Mean width and
mean length of the uppertail-coverts were signifcantly greater in northern
P. m.
mocinno compared to southern
P. m. costaricensis. Our data support a previously
published proposal to treat the two taxa as species based on molecular and other
morphological data.
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