| an examination of species limits in the aulacorhynchus "prasinus" toucanet complex (aves: ramphastidae). | the number of species recognized in aulacorhynchus toucanets has varied tremendously over the past century. revisors seem to disagree on whether head and bill coloration are useful indicators of species limits, especially in the a. "prasinus" complex. using morphometrics, i tested the hypothesis that the major color-based subspecific groups of a. "prasinus" sensu lato are simply "cookie-cutter" (i.e., morphologically nearly identical) toucanets with different head and bill colorations. univariat ... | 2016 | 27635345 |
| characterization of aortic and brachiocephalic filariasis by filarioidea sp (nematoda:spirurida:filarioidea) in mexican ramphastids. | the manuscript presented herein documents the findings of filaria nematodes in 5 keel-billed toucans, and one emerald toucanet, originated from 2 private aviaries in mexico city during two years. the birds displayed ruffled feathers, depression, inability to perch, convulsions, and sudden death. furthermore, thickened wall of the aortic and brachiocephalic arteries, with connective tissue proliferation and chondroid metaplasia were observed. molecular characterization matched filarioidea sp (nem ... | 2020 | 32211290 |