. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Biology and Evolution of Atlapetes • Paynter 339. Figure 13. Distribution of A. semirufus and A. personatus. These differences are easily distinguished but of no great magnitude. It is noteworthy that this is one of the few atlapetes exhibit- ing intraspecific variation in size. Atlapetes fulviceps superspecies This superspecies consists of three al- lospecies, viz. semirufus, personatus, and fulviceps. Although widely separated geo- graphically (Figs. 13, 14), the three are morphologically very similar, \\\\\\ chestn
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Biology and Evolution of Atlapetes • Paynter 339. Figure 13. Distribution of A. semirufus and A. personatus. These differences are easily distinguished but of no great magnitude. It is noteworthy that this is one of the few atlapetes exhibit- ing intraspecific variation in size. Atlapetes fulviceps superspecies This superspecies consists of three al- lospecies, viz. semirufus, personatus, and fulviceps. Although widely separated geo- graphically (Figs. 13, 14), the three are morphologically very similar, \\\\\\ chestnut heads, yellow underparts, and green backs. Chapman, as long ago as 1931, postulated that personatus and fulviceps might be con- specific; this may be the eventual dispo- sition of all three taxa, l)ut I should like to know more of the living birds before taking this step. Atlapetes semirufus Range.—Occurs from the coastal Cordil- lera of northern Venezuela southward through the mountains to Cundinamarca in the Eastern Andes of Colombia (Fig. 13). At the northeastern extremity of its range the species (A. s. denisei) descends to as low as 600 m in the upper tropical zone and as- cends as high as 2,100 m in the subtropical zone. Elsewhere the species does not occur below 1,200 m and is in the subtropical zone, exclusively, except at its southern- most limits where in the vicinitv of Choachi,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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