... modern sheldgeese and shelducks (Anatidae, Tadornini) BRADLEY C. LIVEZEY, BRADLEY C. LIVEZEY Section of Birds, Carnegie Museum of Natural ... for more papers by this author BRADLEY C. LIVEZEY, BRADLEY C. LIVEZEY Section of Birds, Carnegie Museum of Natural History, ...
Tópico(s): Wildlife Ecology and Conservation
1997 - Wiley | Ibis
Bradley C. Livezey, Philip S. Humphrey,
... behaviour of steamer ducks Tachyeres spp. Bradley C. Livezey, Bradley C. Livezey Museum of Natural History and Department of ... for more papers by this author Bradley C. Livezey, Bradley C. Livezey Museum of Natural History and Department of Systematics ...
Tópico(s): Agricultural Practices and Plant Genetics
1984 - Wiley | Ibis
... Modern Seaducks (Anatidae: Mergini) Get access Bradley C. Livezey Bradley C. Livezey Section of Birds, Carnegie Museum of Natural History, ...
Tópico(s): Animal Behavior and Reproduction
1995 - Oxford University Press | Ornithological Applications
... Steamer-Ducks (Anatidae: Tachyeres) Get access Bradley C. Livezey Bradley C. Livezey Museum of Natural History and Department of Systematics ...
Tópico(s): Avian ecology and behavior
1986 - Allen Press | Systematic Zoology
Bradley C. Livezey, Philip S. Humphrey,
... Aggression in Steamer-Ducks Get access Bradley C. Livezey, Bradley C. Livezey Museum of Natural History and Department of Systematics ...
Tópico(s): Wildlife Ecology and Conservation
1985 - Oxford University Press | Ornithological Applications
Bradley C. Livezey, Philip S. Humphrey,
... in Continental Steamer-Ducks Get access Bradley C. Livezey, Bradley C. Livezey Museum of Natural History and Department of Systematics ...
Tópico(s): Wildlife Ecology and Conservation
1984 - Oxford University Press | Ornithological Applications
... heterochrony, giantism and specialization Get access BRADLEY C. LIVEZEY BRADLEY C. LIVEZEY 1Museum of Natural History, Dyche Hall, University of ...
Tópico(s): Evolution and Paleontology Studies
1992 - Oxford University Press | Zoological Journal of the Linnean Society
Roberto Straneck, Bradley C. Livezey, Philip S. Humphrey,
... author on: Oxford Academic Google Scholar Bradley C. Livezey, Bradley C. Livezey Address of second and third authors: Museum of ...
Tópico(s): Avian ecology and behavior
1983 - Oxford University Press | Ornithological Applications
... of disputes, and societal politics in avian systematics Bradley C. Livezey, Corresponding Author Bradley C. Livezey Corresponding author:E-mail address:livezeyb@carnegiemnh.orgSearch for more papers by this author Bradley C. Livezey, Corresponding Author Bradley C. Livezey Corresponding author:E-mail address:livezeyb@carnegiemnh.orgSearch ...
Tópico(s): Genetic diversity and population structure
2010 - Wiley | Cladistics
Modern shorebirds (Neornithes: Charadriiformes) are among the most diverse, phylogenetically challenging, and evolutionarily critical of avian orders. Despite several morphological analyses and diverse molecular studies of the order, a consensus regarding relationships within the order, as well as clarity of membership of Turnix, has heretofore remained elusive. This paper describes a cladistic analysis of 1024 phenotypic characters (427 multistate, 209 of which were ordered), which represents an ...
Tópico(s): Avian ecology and behavior
2010 - Oxford University Press | Zoological Journal of the Linnean Society
Bradley C. Livezey, Richard L. Zusi,
In recent years, avian systematics has been characterized by a diminished reliance on morphological cladistics of modern taxa, intensive palaeornithogical research stimulated by new discoveries and an inundation by analyses based on DNA sequences. Unfortunately, in contrast to significant insights into basal origins, the broad picture of neornithine phylogeny remains largely unresolved. Morphological studies have emphasized characters of use in palaeontological contexts. Molecular studies, following ...
Tópico(s): Morphological variations and asymmetry
2007 - Oxford University Press | Zoological Journal of the Linnean Society
Richard L. Zusi, Bradley C. Livezey,
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 nominal element, the palatinum (os palatinum), is less well known. Here we describe, illustrate, and name variable features of the avian palatinum that we judge to be potentially important for phylogenetic inference. To standardize anatomical nomenclature, we introduce formal names (per ICAAN) and revise others for palatal ...
Tópico(s): Evolution and Paleontology Studies
2006 - | Annals of Carnegie Museum
Tópico(s): Bird parasitology and diseases
2003 - | Ornithological Monographs
Bradley C. Livezey, Richard L. Zusi,
Brill is pleased to announce that its global distribution channels are fully operational again. This includes journal subscriptions and print orders, for both Print on Demand (POD) and stock titles. Electronic publications have been and are available as usual.
Tópico(s): Morphological variations and asymmetry
2001 - Brill | Netherlands Journal of Zoology
Bradley C. Livezey, Richard L. Zusi,
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, the discovery and description of new fossil taxa, has not been paralleled by the development of new anatomical characters for phylogenetic reconstructions. Despite an appreciation of morphological characters for phylogenetics, in part a result of paleontological studies, no anatomically based, taxonomically ...
Tópico(s): Morphological variations and asymmetry
2001 - Brill | Netherlands Journal of Zoology
Richard L. Zusi, Bradley C. Livezey,
Two landmarks of the temporal region of the skull in most birds are the zygomatic process (processus zygomaticus) and the postorbital process (processus postorbitalis).The morphology and homology of these processes in gallinaceous birds (Galliformes) and waterfowl (Anseriformes), however, are not clear.Anseriformes usually are said to lack a processus zygomaticus.By contrast, the processus zygomaticus of many Galliformes often is described as connected to the tip of the processus postorbitalis, forming ...
Tópico(s): Morphological variations and asymmetry
2000 - | Annals of Carnegie Museum
The order Gruiformes, for which even familial composition remains controversial, is perhaps the least well understood avian order from a phylogenetic perspective. The history of the systematics of the order is presented, and the ecological and biogeographic characteristics of its members are summarized. Using cladistic techniques, phylogenetic relationships among fossil and modern genera of the Gruiformes were estimated based on 381 primarily osteological characters; relationships among modern species ...
Tópico(s): Fish biology, ecology, and behavior
1998 - Royal Society | Philosophical Transactions of the Royal Society B Biological Sciences
Tópico(s): Morphological variations and asymmetry
1997 - Oxford University Press | Zoological Journal of the Linnean Society
Tópico(s): Morphological variations and asymmetry
1997 - | Annals of Carnegie Museum
A phylogenetic analysis of 123 morphological characters of basal waterfowl (Aves: Anseriformes) and other selected avian orders confirmed that the screamers (Anhimae: Anhitn-idae) are the sister-group of other waterfowl (Anseres), and that the magpie goose (Anseranatidae: Anseranas semipalmata) is the sister group of other modern waterfowl exclusive of screamers (Anatidae sensu stricto). The analysis also supports the traditional hypothesis of the gallinaceous birds (Galliformes) as the sister group of ...
Tópico(s): Ichthyology and Marine Biology
1997 - Oxford University Press | Zoological Journal of the Linnean Society
A phylogenetic analysis of modern pochards (Aythyini) was performed using 99 characters of the skeleton, trachea, natal plumage, and definitive integument. Three shortest trees were found (length = 148; consistency index for informative characters = 0.68) which: (1) placed Marmaronetta as the sister group to other members; (2) defined a basal clade comprising as sister groups Rhodonessa caryophyllacea + Netta rufina and N. peposaca + N. erythrophthalma; and (3) defined as the sister group to the preceding clade ...
Tópico(s): Wildlife Ecology and Conservation
1996 - Oxford University Press | Ornithology
A phylogenetic analysis of modern and selected fossil geese and swans was performed using 165 characters of the skeleton, trachea, and natal and definitive integument. Five shortest trees were found (length = 318; consistency index for informative characters = 0.634), which differed only in details of relationships among three species of Branta. The trees supported (1) †Cnemiornis as sister group to other taxa analyzed; (2) a sister group relationship between the moa-nalos of Hawaii and other geese and ...
Tópico(s): Evolution and Paleontology Studies
1996 - Oxford University Press | Systematic Biology
A phylogenetic analysis of modern and selected fossil geese and swans was performed using 165 characters of the skeleton, trachea, and natal and definitive integument. Five shortest trees were found (length = 318; consistency index for informative characters = 0.634), which differed only in details of relationships among three species of Branta. The trees supported (1) †Cnemiornis as sister group to other taxa analyzed; (2) a sister group relationship between the moa-nalos of Hawaii and other geese and ...
Tópico(s): Evolution and Paleontology Studies
1996 - Oxford University Press | Systematic Biology
Phylogenetic analysis of eight problematic genera of waterfowl {Stictonetta Plectropterus, Sarkidiornis, Hymenolaimus, Tachyeres, Merganetta, Malacorhynchus, and Salvadorina) and representatives of other tadornine genera and anatine tribes was undertaken using 114 morphological characters (39 skeletal, four tracheal, 1 1 natal, and 60 of the definitive integument) and a variety of weighting schemes, in an attempt to clarify relationships in the most poorly understood segment of the phylogeny of Anseriformes ( ...
Tópico(s): Morphological variations and asymmetry
1996 - | Annals of Carnegie Museum
A cladistic analysis of the stiff-tailed ducks (Anatidae: Oxyurini) was con- ducted using 92 morphological characters. The analysis produced one minimum-length, completely dichotomous phylogenetic tree of high consistency (consistency index for infor- mative characters, 0.74). Monophyly of the tribe was supported by 17 unambiguous syna- pomorphies. Within the tribe, Heteronetta (1 species) is the sister-group of other members; within the latter clade (supported by 2 1 unambiguous synapomorphies), Nomonyx ( ...
Tópico(s): Genetic diversity and population structure
1995 - Wilson Ornithological Society | The Wilson Journal of Ornithology
A phylogenetic analysis of the eight species of whistling-duck ( Dendrocygna ) and the White-backed Duck ( Thalassornis leuconotus ) was performed using 68 characters of the skeleton, trachea, and natal and definitive integument.Three shortest trees were found, each having a length of 9 1 and a consistency index of 0.766 (excluding uninformative characters).Monophyly of Dendrocygna + Thalassornis was supported by three unambiguous synapomorphies, and monophyly of Dendrocygna by eight unambiguous synapomorphies. ...
Tópico(s): Livestock and Poultry Management
1995 - | Annals of Carnegie Museum
Philip S. Humphrey, Bradley C. Livezey, Douglas Siegel-Causey,
Tópico(s): Avian ecology and behavior
1987 - | Bird Behavior
Abstract A phylogenetic analysis of all Recent genera of the Anseriformes using 120 morphological characters supports much of the current consensus regarding intraordinal relationships. I found that (1) Anseranas should be placed in a monotypic family; (2) Dendrocygna, Thalassornis, geese and swans, and Stictonetta are paraphyletic to the rest of the Anatidae; (3) Cereopsis is the sister group to Anser and Branta, and Coscoroba is the sister group to Cygnus and Olor; (4) Plectropterus is the sister ...
Tópico(s): Fish Biology and Ecology Studies
1986 - Oxford University Press | Ornithology
Bradley C. Livezey, Philip S. Humphrey,
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 flightless species are related to absolutely shorter remiges, and to relatively or absolutely shortened wing bones, although these reductions differ among species. Reduced lengths of the ulna, radius, and carpometacarpus are associated most strongly with flightlessness. Pectoral muscles and the associated sternal ...
Tópico(s): Animal Behavior and Reproduction
1986 - Oxford University Press | Evolution
Bradley C. Livezey, Philip S. Humphrey,
Tópico(s): Animal Ecology and Behavior Studies
1986 - Oxford University Press | Evolution