Limusaurus and bird digit identity
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چکیده
منابع مشابه
Frame-shifts of digit identity in bird evolution and Cyclopamine-treated wings.
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 of early birds like Archaeopteryx corresponds to that of digits 1, 2, and 3 of other archosaurs. A hypothesis is that a homeotic "frame-shift" occurred, such that in the bird wing...
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Vargas and Fallon (2005. J Exp Zool (Mol Dev Evol) 304B:86-90) propose that Hox gene expression patterns indicate that the most anterior digit in bird wings is homologous to digit 1 rather than to digit 2 in other amniotes. This interpretation is based on the presence of Hoxd13 expression in combination with the absence of Hoxd12 expression in the second digit condensation from which this digit...
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ژورنال
عنوان ژورنال: Nature Precedings
سال: 2009
ISSN: 1756-0357
DOI: 10.1038/npre.2009.3828.1