Browsing by Author "Vargas, Alexander O."
Now showing items 1-13 of 13
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(Springer, 2015)Specialized morphologies of bird feet have evolved several times independently as different groups have become zygodactyl, semi-zygodactyl, heterodactyl, pamprodactyl or syndactyl. Birds have also convergently evolved ...
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(Sociedad de Biología de Chile, 2005-12)It has been argued that the study of natural selection and quantitative genetics should have a central role in evolutionary thinking and undergraduate teaching in Chile. Extensive operational use of the concept of natural ...
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(WILEY-LISS, DIV JOHN WILEY & SONS INC, 2009-07-25)The controversy surrounding the alleged Lamarckian fraud of Paul Kammerer’s midwife toad experiments has intrigued generations of biologists. A re-examination of his descriptions of hybrid crosses of treated and nontreated ...
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(Universidad de Chile, 2015)
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(Universidad de Chile, 2015)En este trabajo se estudio el desarrollo de los centros de cartílago, mediante técnicas de tinción de cartílago whole mount, tinción en cortes histológicos e inmuno-tincion en los intervalos relevantes del desarrollo carpal, ...
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(WILEY-BLACKWELL, 2009-11)Digit identity in the avian wing is a classical example of conflicting anatomical and embryological evidence regarding digit homology. Anatomical in conjunction with phylogenetic evidence supports the hypothesis that ...
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(WILEY-BLACKWELL, 2009-03)A highly conserved spatio-temporal pattern of cartilage formation reveals that the digits of the bird wing develop from positions that become digits 2, 3, and 4 in other amniotes. However, the morphology of the digits ...
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(Universidad de Chile, 2012)La identidad de Los tres dígitos del ala de las aves ha sido un tema de gran discusión entre biólogos del desarrollo y paleontólogos durante más de 140 años. por una parte, basándose en el patrón de desarrollo de los ...
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(Universidad de ChileUniversidad de Chile, 2014)
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(Asociacion Paleontologica Argentina, 2015)A description is provided of the first sauropod remains (i.e., isolated vertebrae and appendicular bones) from the Late Jurassic of Aysen, in Chilean Patagonia (Toqui Formation, late Tithonian). Although the bones found ...
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(BioMed Central Ltd., 2014)Background: The homology of the digits in the bird wing is a high-profile controversy in developmental and evolutionary biology. The embryonic position of the digits cartilages with respect to the primary axis (ulnare ...
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(American Society of Mammalogists, 2008-07-22)Brachydelphis mazeasi Muizon, 1988a, from the Pisco Formation (middle Miocene, Peru), is an odontocete originally known from 2 incomplete skulls and a few associated postcranial elements, assigned to the family Pontoporiidae, ...
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(PUBLIC LIBRARY SCIENCE, 2008-10-03)Background: Comparative morphology identifies the digits of the wing of birds as 1,2 and 3, but they develop at embryological positions that become digits 2, 3 and 4 in other amniotes. A hypothesis to explain this is that ...
