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@article{Maidment:2014:10.1007/s00114-014-1239-2,
author = {Maidment, SCR and Henderson, DM and Barrett, PM},
doi = {10.1007/s00114-014-1239-2},
journal = {Naturwissenschaften},
pages = {989--1001},
title = {What drove reversions to quadrupedality in ornithischian dinosaurs? Testing hypotheses using centre of mass modelling},
url = {http://dx.doi.org/10.1007/s00114-014-1239-2},
volume = {101},
year = {2014}
}
TY - JOUR
AB - The exceptionally rare transition to quadrupedalismfrom bipedal ancestors occurred on three independent occasionsin ornithischian dinosaurs. The possible driving forcesbehind these transitions remain elusive, but several hypotheses—includingthe development of dermal armour and theexpansion of head size and cranial ornamentation—have beenproposed to account for this major shift in stance. Wemodelled the position of the centre of mass (CoM) in severalexemplar ornithischian taxa and demonstrate that the anteriorshifts in CoM position associated with the development of anenlarged skull ornamented with horns and frills for display/defence may have been one of the drivers promoting ceratopsianquadrupedality. A posterior shift in CoM position coincidentwith the development of extensive dermal armour inthyreophorans demonstrates this cannot have been a primarycausative mechanism for quadrupedality in this clade.Quadrupedalism developed in response to different selectivepressures in each ornithischian lineage, indicating differentevolutionary pathways to convergent quadrupedalmorphology.
AU - Maidment,SCR
AU - Henderson,DM
AU - Barrett,PM
DO - 10.1007/s00114-014-1239-2
EP - 1001
PY - 2014///
SN - 0028-1042
SP - 989
TI - What drove reversions to quadrupedality in ornithischian dinosaurs? Testing hypotheses using centre of mass modelling
T2 - Naturwissenschaften
UR - http://dx.doi.org/10.1007/s00114-014-1239-2
UR - http://hdl.handle.net/10044/1/26241
VL - 101
ER -