Snakes follow lizards, in evolution [48,99]. However, many snakes still have vestigial limbs (boa, python ).
Reference 491 is incorrectly cite here; could be reference 48b2 instead.
It’s a pity that Fleury don’t present Cohn & Tickle’s [48b] and Cohn et al. [48a]3 in his discussion of limb positioning and specification.
1. Tbx3 can alter limb position along the rostrocaudal axis of the developing embryo, Charalampos Rallis, Jo Del Buono and Malcolm P. O. Logan, Development 132, 1961-1970 2005 doi:10.1242/dev.01787
2. Developmental basis of limblessness and axial patterning in snakes, Martin J. Cohn and Cheryll Tickle, Nature Volume 399, 1999 doi:10.1038/20944
3. Hox9 genes and vertebrate limb specification, Cohn MJ, Patel K, Krumlauf R, Wilkinson DG, Clarke JD, Tickle C., Nature. 1997 May 1;387(6628):97-101, doi:10.1038/387097a0
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