pygostyle


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Related to pygostyle: Synsacrum

pygostyle

the upturned tip of the vertebral column of birds consisting of fused vertebrae.
References in periodicals archive ?
Because the first rectrix on each side was firmly attached to the pygostyle, this bone was disarticulated from the tail and removed with the rectrices, which were removed in 1 fan-like piece (Fig 4).
dicolorus Female (n=11) Parameter Min Max Mean SD Coeficient Variation 1 6.95 10.19 8.57 0.81 9.43 2 6.83 9.68 8.25 0.71 8.63 3 4.07 6.08 5.44 0.68 12.58 4 2.74 3.20 2.97 0.11 3.86 6 3.25 4.14 3.70 0.22 6.01 7 2.67 3.28 2.98 0.15 5.17 8 3.96 4.80 4.38 0.21 4.77 9 3.96 4.80 4.38 0.21 4.77 10 1.17 1.99 1.58 0.20 12.98 11 20.8 24.61 22.72 0.94 4.14 1--Culmem; 2--Tomium; 3--Lower comeal beak length; 4--Upper beak lateral height: 5--Beak black marking length; 6--Total beak lateral height; 7--Base beak width; 8--Length from occipital up to beak insertion; 9--Tarsometatarsal length; 10--Cloacal aperture; 11--Length from beak to pygostyle. ACKNOWLEDGMENTS
Because the rectrices and bulb attach only to the pygostyle, the tail fan is isolated on this terminal bone.
The pygostyle was absent and the synsacrum had been gnawed, although not destroyed.
The bird had flight-specialized shoulders and a distinctly avian adaption called the pygostyle -- a shortened set of tail vertebrae fused into one bone.
Falling and heavy landings in pet birds are commonly associated with inappropriate trimming of the flight feathers, often leading to a variety of injuries including sternal, pygostyle, beak, and leg injuries.
In pigeons the tail skeleton is composed of five or six caudal vertebrae and a bladelike pygostyle. On each side of the pygostyle lie the rectricial bulbs, specialized fibroadipose structures that encase the roots of the twelve rectrices (Baumel 1988).
And at the end of the vertebrate column, the fossil has a bone called a pygostyle, which is the skeletal basis of an avian tail.