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Protoceratops positive allometry for exaggerated structures (free pdf)
A new paper in open access Palaeontologia Electronica:
David W. E. Hone, Dylan Wood, and Robert J. Knell (2016)
Positive allometry for exaggerated structures in the ceratopsian
dinosaur Protoceratops andrewsi supports socio-sexual signaling.
Palaeontologia Electronica 19.1.5A: 1-13
The allometry in the frill and jugal bosses of the small ornithischian
dinosaur Protoceratops andrewsi are assessed. An analysis of 37
specimens, encompassing four distinct size classes of animal, shows
that the frill (in both length and width) undergoes positive allometry
during ontogeny, while the jugals also show a trend towards an
increase in relative size. In conjunction with other data, this
provides support that these features were under selection as
socio-sexual dominance signals.