[dinosaur] Manus-only sauropod trackways from Glen Rose Formation

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Ben [email protected]=0A=0AA new paper:=0A=0A=3D=3D=3D=3D=0A=
=0AJames O. Farlow, Robert T. Bakker, Benjamin F. Dattilo, E. Everett=0ADes=
chner, Peter L. Falkingham, Crystal Harter, Richard Solis, David Temple=0A&=
 William Ward (2019)=0AThunder lizard handstands: Manus-only sauropod track=
ways from the Glen Rose=0AFormation (Lower Cretaceous, Kendall County, Texa=
s).=0AIchnos (advance online publication)=0Adoi: https://urldefense.proofpo=
int.com/v2/url?u=3Dhttps-3A__doi.org_10.1080_10420940.2019.1698424&d=3DDwIF=
aQ&c=3DclK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=3DRy_mO4IFaUmGof_Yl9My=
ZgecRCKHn5g4z1CYJgFW9SI&m=3D0u26y5v0qV45Gq17MN6vJWLOe2a_eguFrmIBjdsG_78&s=
=3DNI5eK71CMPU0dQz3Ijv8wpjg9nBFQlW8x-LN8yLR-hk&e=3D=20=0Ahttps://urldefense=
.proofpoint.com/v2/url?u=3Dhttps-3A__www.tandfonline.com_doi_abs_10.1080_10=
420940.2019.1698424&d=3DDwIFaQ&c=3DclK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc=
_gI&r=3DRy_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=3D0u26y5v0qV45Gq17MN6=
vJWLOe2a_eguFrmIBjdsG_78&s=3DVmJCNZyNHMv8jIDlKKtKA52XYxRPs0RicxEGBXwlYsM&e=
=3D=20=0A=0A=0AThree parallel, manus-only sauropod trackways from the Coffe=
e Hollow A-Male=0Atracksite (Glen Rose Formation, Kendall County, Texas) we=
re studied=0Aseparately by researchers from the Heritage Museum of the Texa=
s Hill=0ACountry and the Houston Museum of Natural Sciences. Footprint and =
trackway=0Ameasurements generally show good agreement between the two group=
s=E2=80=99 data=0Asets. Footprints appear to be shallowly impressed true tr=
acks rather than=0Aundertracks. One of the Coffee Hollow trackways shows ma=
rked asymmetry in=0Athe lengths of paces that begin with the left as oppose=
d to the right=0Aforefoot, and two of the Coffee Hollow trackways are unusu=
ally broad. The=0ACoffee Hollow trackways differ enough from the manus port=
ions of other Glen=0ARose Formation sauropod trackways to suggest that they=
 were made by a=0Adifferent kind of sauropod. Greater differential pressure=
 exerted on the=0Asubstrate by the forefeet than the hindfeet probably expl=
ains the Coffee=0AHollow trackways, like other manus-only sauropod trackway=
s, but the=0Apossibility that they indicate unusual locomotion cannot at pr=
esent be=0Aruled out.=0A=0A=3D=3D=3D=3D=3D=0A=

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<div dir=3D"ltr"><div><br></div>Ben Creisler<div><a href=3D"mailto:bcreisle=
[email protected]">[email protected]</a></div><div><br></div><div>A new paper:<=
br><div><br></div><div>=3D=3D=3D=3D</div><div><br>James O. Farlow, Robert T=
. Bakker, Benjamin F. Dattilo, E. Everett Deschner, Peter L. Falkingham, Cr=
ystal Harter, Richard Solis, David Temple &amp; William Ward (2019)<br>Thun=
der lizard handstands: Manus-only sauropod trackways from the Glen Rose For=
mation (Lower Cretaceous, Kendall County, Texas).<br>Ichnos (advance online=
 publication)<br>doi: <a href=3D"https://urldefense.proofpoint.com/v2/url?u=
=3Dhttps-3A__doi.org_10.1080_10420940.2019.1698424&amp;d=3DDwMFaQ&amp;c=3Dc=
lK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&amp;r=3DRy_mO4IFaUmGof_Yl9MyZgec=
RCKHn5g4z1CYJgFW9SI&amp;m=3D0u26y5v0qV45Gq17MN6vJWLOe2a_eguFrmIBjdsG_78&amp=
;s=3DNI5eK71CMPU0dQz3Ijv8wpjg9nBFQlW8x-LN8yLR-hk&amp;e=3D">https://doi.org/=
10.1080/10420940.2019.1698424</a><br><a href=3D"https://urldefense.proofpoi=
nt.com/v2/url?u=3Dhttps-3A__www.tandfonline.com_doi_abs_10.1080_10420940.20=
19.1698424&amp;d=3DDwMFaQ&amp;c=3DclK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_=
gI&amp;r=3DRy_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&amp;m=3D0u26y5v0qV45=
Gq17MN6vJWLOe2a_eguFrmIBjdsG_78&amp;s=3DVmJCNZyNHMv8jIDlKKtKA52XYxRPs0RicxE=
GBXwlYsM&amp;e=3D">https://www.tandfonline.com/doi/abs/10.1080/10420940.201=
9.1698424</a>=C2=A0</div><div><br><br>Three parallel, manus-only sauropod t=
rackways from the Coffee Hollow A-Male tracksite (Glen Rose Formation, Kend=
all County, Texas) were studied separately by researchers from the Heritage=
 Museum of the Texas Hill Country and the Houston Museum of Natural Science=
s. Footprint and trackway measurements generally show good agreement betwee=
n the two groups=E2=80=99 data sets. Footprints appear to be shallowly impr=
essed true tracks rather than undertracks. One of the Coffee Hollow trackwa=
ys shows marked asymmetry in the lengths of paces that begin with the left =
as opposed to the right forefoot, and two of the Coffee Hollow trackways ar=
e unusually broad. The Coffee Hollow trackways differ enough from the manus=
 portions of other Glen Rose Formation sauropod trackways to suggest that t=
hey were made by a different kind of sauropod. Greater differential pressur=
e exerted on the substrate by the forefeet than the hindfeet probably expla=
ins the Coffee Hollow trackways, like other manus-only sauropod trackways, =
but the possibility that they indicate unusual locomotion cannot at present=
 be ruled out.</div><div><br>=3D=3D=3D=3D=3D<br></div></div></div>=0A=

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