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Higher-Order Phylogenetics of Modern Aves Based On Comparative Anatomy
New fossils have contributed much to our knowledge of avian origins but have shed little light on higher-order relationships among modern Aves. This is because the primary focus of paleornithology,Expand
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FLIGHTLESSNESS IN STEAMER‐DUCKS (ANATIDAE: TACHYERES): ITS MORPHOLOGICAL BASES AND PROBABLE EVOLUTION
Flightlessness in Tachyeres is caused by wing‐loadings in excess of 2.5 g·cm–2, which result from the large body size and small wing areas of the flightless species. Reduced wing areas of flightlessExpand
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VARIATION IN THE OS PALATINUM AND ITS STRUCTURAL RELATION TO THE PALATUM OSSEUM OF BIRDS (AVES)
ABSTRACT Morphological variation in the avian palatal skeleton (palatum osseum) was publicized by Huxley (1867) and expanded upon subsequently by many authors, but variation in the included nominalExpand
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Morphometric patterns in Recent and fossil penguins (Aves, Sphenisciformes)
A total of 622 skin specimens, 527 skeletons, and myological data compiled by Schreiweis (1972) were used to investigate morphometric patterns within and among the 18 Recent species of Spheniscidae,Expand
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Morphology of flightlessness in Chendytes, fossil seaducks (Anatidae: Mergini) of coastal California
ABSTRACT The anatid genus Chendytes comprises two species from the Pleistocene and early Holocene of California: the comparatively large C. lawi and the smaller (poorly represented) C. milleri.Expand
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FLIGHTLESSNESS IN GREBES (AVES, PODICIPEDIDAE): ITS INDEPENDENT EVOLUTION IN THREE GENERA
  • B. C. Livezey
  • Biology, Medicine
  • Evolution; international journal of organic…
  • 1 January 1989
The morphological bases of flightlessness in three genera of grebes were studied using 790 study skins, 322 skeletons, myological data from 40 anatomical specimens studied by Sanders (1967), andExpand
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Morphological corollaries and ecological implications of flightlessness in the kakapo (Psittaciformes: Strigops habroptilus)
The morphological corollaries of flightlessness of the kakapo (Strigops habroptilus) have been studied using skin specimens, skeletons, and pectoral dissection of an anatomical specimen. These haveExpand
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Mechanics of Steaming in Steamer-ducks
Steamer-ducks (Tachyeres) comprise three flightless species, distributed in the marine littoral environments of southern Chile and Argentina (T. pteheres, T. leucocephalus) and the Falkland IslandsExpand
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Duck Nesting in Retired Croplands at Horicon National Wildlife Refuge, Wisconsin
Duck nesting was studied in 85 retired agricultural fields at Horicon National Wildlife Refuge, Wisconsin, during 1976-78, as a basis for management recommendations to increase upland duckExpand
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