Browsing by Author "Phelps, William Henry."
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Item An annotated list of the birds of Cerro Urutaní on the border of Estado Bolívar, Venezuela, and Territorio Roraima, Brazil. American Museum novitates ; no. 2732(New York, N.Y. : American Museum of Natural History, 1982) Dickerman, Robert William, 1926-; Phelps, William Henry."The avifauna of the subtropicakl forests on the summit of Cerro Urutaní, a previously uncollected isolated tableland or 'tepui' of 1280 m. elevation on the Venezuelan-Brazilian border, is reported. A total of 82 species was collected in March and April 1977 during a fieldtrip sponsored by the Colección Ornitológica Phelps of Caracas, Venezuela, and joined by the American Museum of Natural History. Cerro Urutaní is near the middle of the east-west trending Sierra Pacaraima. This collection permitted the first analysis of the role of the Sierra Pacaraima as an avenue of dispersal between the tepuis of the Gran Sabana on the east and the more isolated tepuis of Territorio Amazonas on the western side of the region. Geographic variation is analyzed for several Pantepui species (as defined by Mayr and Phelps, 1967) with several populations needing further study noted. Forty-four (51%) of the 82 species collected represent Pantepui species, although Cerro Urutaní is a relatively low tepui"--P. [1].Item New species and subspecies of birds from Venezuela. 1. American Museum novitates ; no. 1270(New York City : The American Museum of Natural History, 1944) Zimmer, John T. (John Todd), 1889-1957.; Phelps, William H. (William Henry), b. 1875.; Phelps, William Henry.Item A new subspecies of Icterus icterus and other notes on the birds of northern South America. American Museum novitates ; no. 2270(New York, N.Y. : American Museum of Natural History, 1966) Phelps, William Henry.; Aveledo Hostos, Ramón.Item Notes on some birds of northern Venezuela. American Museum novitates ; no. 1927(New York, N.Y. : American Museum of Natural History, 1959) Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Phelps, William Henry.Item The origin of the bird fauna of the south Venezuelan highlands. Bulletin of the AMNH ; v. 136, article 5(New York : [American Museum of Natural History], 1967) Mayr, Ernst, 1904-; Phelps, William Henry."The isolated tabletop mountains in southern Venezuela (including Roraima and Duida), the adjacent border of Brazil, and Guyana are the home of an interesting highland avifauna rich in endemics. We have designated the area as Pantepui. 2. The history of the ornithological exploration of these mountains, beginning in 1842 with the work of the Schomburgks, is presented. Birds have been collected on a total of 26 cerros and tepuis. Of the approximately 10,750 specimens taken, 8340 are in the Phelps Collection in Caracas. 3. Ninety-six species can be considered typical subtropical elements. Twenty-nine of these are endemic species or superspecies. 4. The subtropical elements are found on the summits and in the cool humid forests of the talus slopes. 5. About two-thirds of the characteristic elements are widely distributed in the Pantepui area. Five species have not yet been found east of the Río Caroní; 18 species are found only to the east of it. 6. Many (viz., 42) species are represented on Pantepui by several subspecies, six in the case of Atlapetes personatus, five or four in several other species. Nine of the 29 endemic species are monotypic. Two species have evolved into superspecies. 7. The 96 Pantepui elements represent every stage of endemicity, from endemic genera (two or three weakly characterized ones) and species (29), to non-endemic species with endemic subspecies (55), and non-endemic species without endemic subspecies (12). 8. The 96 Pantepui species can be assigned to four kinds of faunal elements: (a) specialized cliff dwellers (five species), (b) altitudinal derivatives of elements that are tropical in other areas (34), (c) long-distance colonists which reached Pantepui by 'hopping' across the unsuitable lowlands (48), and (d) old endemics which may have originated as either (b) or (c) (nine). 9. Many species exhibit strong geographic variation in habitat preference. Basically subtropical species may have tropical populations and vice versa. Such plasticity unquestionably facilitates the crossing of ecological barriers, such as lowlands present for mountain birds. 10. Among the 48 species of long-distance colonists 24 species presumably came from the Andes; 19 species, from the coastal cordilleras of northern Venezuela; and five species, from more distant areas. 11. The small number of old endemics indicates a rapid replacement in the bird fauna of these mountains, which must have existed for some 30 million years. 12. Although a few of the Pantepui endemics can be called relicts, they are not remnants of a formerly more widespread fauna, which is now extinct elsewhere. Most endemics belong to the most actively speciating genera and families of South American birds"--P. 307.Item Seven new subspecies of birds from Venezuela and Brazil. American Museum novitates ; no. 1338(New York City : The American Museum of Natural History, 1947) Zimmer, John T. (John Todd), 1889-1957.; Phelps, William H. (William Henry), b. 1875.; Phelps, William Henry.; Gilliard, E. Thomas (Ernest Thomas), 1912-1965.; Phelps Venezuelan Expedition (1937-1938)