Comparative embryonic development of the skeleton of the domestic turkey (Meleagris gallopavo) and other galliform birds

Maxwell, Erin E.

doi:10.1016/j.zool.2007.08.004

Cited by 53 publications

(108 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Assim como observado para outras espécies de aves (Maxwell 2008, Rezk, 2015, cada fíbula também apresentou uma cabeça bem desenvolvida, que se articulava com o côndilo lateral do fêmur, e um estreito corpo, que se articulou em todos os casos analisados com o terço proximal do corpo do tibiotarso, formando aparentemente uma sindesmose (Fig.8).…”

Section: Resultsunclassified

Descrição anatômica de esqueletos de papagaios do gênero Amazona através da utilização de radiografias

Cavinatto

Armando²,

Cruz

et al. 2016

Pesq. Vet. Bras.

View full text Add to dashboard Cite

RESUMO.-O esqueleto de papagaios da espécie Amazona aestiva foi descrito e comparado com representantes de outras espécies do gênero Amazona. Para tanto, foram utilizados 22 exemplares da espécie Amazona aestiva; dois das espécies Amazona vinacea; Amazona rhodocorythae, Amazona farinosa, além de um exemplar das espécies Amazona brasiliensis e Amazona pretrei, doados após morte natural pelo Criadouro Poços de Caldas. Foram realizadas radiografias de corpo inteiro, variando de decúbito lateral direito ou esquerdo, no caso das projeções latero-laterais, e em decúbito dorsal, no caso da projeção ventro-dorsal. Independentemente da espécie, os crânios dos papagaios estudados puderam ser classificados como pró-cinéticos, por apresentarem liberdade de movimentos em sua porção rostral. Na maioria dos casos, a coluna vertebral esteve formada por 12 vértebras cervicais, seis vértebras torácicas livres, sinsacro (formado pela fusão da última vértebra torácica, 7 lombosacrais e uma caudal), cinco vértebras caudais livres e pelo pigóstilo (formado por três vértebras caudais fusionadas) e, apesar de diferenças pontuais, o esqueleto apendicular torácico e pélvico se mostrou muito semelhante ao observado para outros gêneros de aves e, inclusive, não foi possí-vel observar dimorfismo sexual através das características anatômicas dos esqueletos dos papagaios trabalhados. This study describes the skeleton of Amazona aestiva parrots and compared it with representatives of other Amazona species. To this end, we used 22 specimens of Amazona aestiva, two specimens each of Amazona vinacea; Amazona rhodocorythae, Amazona farinosa and one specimen each of Amazona brasiliensis and Amazona pretrei donated after natural death by Poços de Caldas Breeding Park. Full body radiographs were taken, in either the right or left lateral decubitus position, in the case of laterolateral projections, and in supine position, in the case of ventrodorsal projection. Regardless of the species, skulls of the parrots were classified as prokinetic, because of free movements in their rostral portion. In most cases, the spine consisted of: 12 cervical vertebrae, six free thoracic vertebrae, synsacrum (formed by the fusion of the last thoracic vertebrae, 7 lumbosacral vertebrae and one caudal vertebrae), five free caudal vertebrae and the pygostyle (formed by three fused caudal vertebrae). Despite punctual differences, thoracic and pelvic appendicular skeleton proved to be very similar to that observed for other genera of birds. In addition, there was no sexual dimorphism considering the anatomical characteristics of the skeletons of parrots analyzed.

show abstract

Section: Resultsunclassified

Descrição anatômica de esqueletos de papagaios do gênero Amazona através da utilização de radiografias

Cavinatto

Armando²,

Cruz

et al. 2016

Pesq. Vet. Bras.

View full text Add to dashboard Cite

show abstract

“…We also recognize that the developmental pathways that lead to a superficial morphotype may have changed through time and in clade-specific ways. Furthermore, a majority of recent research on living birds focuses on embryological development 4,5,[14][15][16][17][18] , which is poorly known for extinct taxa. However, a review of literature dating back over a century creates the basis for comparison with enantiornithines 5,6,8,13,14,16,19 .…”

Section: Discussionmentioning

confidence: 99%

Insight into the early evolution of the avian sternum from juvenile enantiornithines

et al. 2012

View full text Add to dashboard Cite

The sternum is one of the most important and characteristic skeletal elements in living birds, highly adapted for flight and showing a diverse range of morphologies. new exceptional material of young juvenile specimens from the Early Cretaceous Jehol Group in northeastern China reveals the unique sequence of development in the sternum of Enantiornithes, the dominant clade of Cretaceous birds. We recognize six ossifications that together form the sternum, three of which were previously unknown. Here we show that although basal living birds apparently have retained the dinosaurian condition in which the sternum develops from a bilateral pair of ossifications (present in paravian dinosaurs and basal birds), the enantiornithine sternal body primarily develops from two unilateral proximo-distally arranged ossifications. This indicates that although superficially similar, the sternum formed very differently in enantiornithines and ornithuromorphs, suggesting that several ornithothoracine sternal features may represent parallelism. This highlights the importance of ontogenetic studies for understanding homology and the evolution of skeletal features in palaeontology.

show abstract

“…The amount of ossification sequence variability detected is not significantly greater than in more traditional morphological data sets (Berger, 1956;Mabee et al, 2000;Maisano, 2002;Maxwell and Larsson, 2007;Maxwell, 2008). Consistent intraspecific variation in some taxa suggests that ecological factors may also play a role (Sheil and Greenbaum, 2005), but these remain poorly defined.…”

mentioning

confidence: 81%

“…Ossification is described in the text by anatomical region, followed by stage, and lastly by species (Table 1); Table 2 reflects the sequence of ossification of the entire embryo. The sample sizes used are too small to make a detailed analysis of the variability of ossification sequence data within each species; however, previous studies have shown that intraspecific variability for this type of data is within the range of that of other morphological data sets (Mabee et al, 2000;Maisano, 2002;Maxwell, 2008).…”

Section: Methodsmentioning

confidence: 99%

“…Ossification sequence is influenced by numerous developmental factors, including muscle development and embryonic movements (Adriaens and Verraes, 1998;Wagemans and Vandewalle, 2001), as well as constraints such as modularity, the sequence of chondrification, and the source of osteogenic cells (Fröbisch, in press;Maxwell, 2008). Shape variables may also influence the observed sequence; these include sexual dimorphism (Garn et al, 1966) and adult morphology (Haluska and Alberch, 1983;Adams, 1992;Rieppel, 1993).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Ossification sequence of the avian order anseriformes, with comparison to other precocial birds

Maxwell

2008

Journal of Morphology

Self Cite

View full text Add to dashboard Cite

Ossification sequences are poorly known for most amniotes, and yet they represent an important source of morphogenetic, phylogenetic, and life history information. Here, the author describes the ossification sequences of three ducks, the Common Eider Somateria mollissima dresseri, the Pekin Duck Anas platyrhynchos, and the Muscovy Duck Cairina moschata. Sequence differences exist both within and among these species, but are generally minor. The Common Eider has the most ossified skeleton prior to hatching, contrary to what is expected in a subarctic migrant species. This may be attributed to a tradeoff between growth rate and locomotory performance. Growth rate is higher in hatchlings with more cartilaginous skeletons, but this may compromise locomotion. No major ossification sequence differences were observed in the craniofacial skeleton when compared with Galliformes, which suggests that the influence of adult morphology on ossification sequence might be relatively minor in many taxa. Galliformes and Anseriformes, while both highly ossified at hatching, differ in the location of their late-stage ossification centers. In Anseriformes, these are most often located in the appendicular skeleton, whereas in Galliformes they are in the thoracic region and form the ventilatory apparatus.

show abstract

Comparative embryonic development of the skeleton of the domestic turkey (Meleagris gallopavo) and other galliform birds

Cited by 53 publications

References 39 publications

Descrição anatômica de esqueletos de papagaios do gênero Amazona através da utilização de radiografias

Descrição anatômica de esqueletos de papagaios do gênero Amazona através da utilização de radiografias

Insight into the early evolution of the avian sternum from juvenile enantiornithines

Ossification sequence of the avian order anseriformes, with comparison to other precocial birds

Contact Info

Product

Resources

About