Re: [dinosaur] Stegosaur shoulder spines

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There are two possible orientations, upward and downward, for the
parascapular spines of *Gigantspinosaurus* and *Yingshanosaurus.* Both have
spines with large, flattened bases. It seems most likely that the base lay
flat across the scapula, with the spine itself pointing either up or down.
Tracy Ford made a diagram showing the orientations for *Gigantspinosaurus *(
https://urldefense.proofpoint.com/v2/url?u=3Dhttp-3A__www.paleofile.com_Din=
osaurs_Armor_Gigantospinosaurus.asp&d=3DDwIBaQ&c=3DclK7kQUTWtAVEOVIgvi0NU5B=
OUHhpN0H8p7CSfnc_gI&r=3DRy_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=3DprJ=
MwmK-z3m83zV9UNF79HBhREptfJPl8_Lvf8XYDVE&s=3DAe00fPWOQixfuvouXx3qNDd1IGxgTZ=
VPGN-FuOOW6no&e=3D ) and I made
one for *Yingshanosaurus *(
https://urldefense.proofpoint.com/v2/url?u=3Dhttps-3A__incertaesedisblog.wo=
rdpress.com_yingshanosaurus-2Dparascapular-2Dspines_&d=3DDwIBaQ&c=3DclK7kQU=
TWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=3DRy_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1=
CYJgFW9SI&m=3DprJMwmK-z3m83zV9UNF79HBhREptfJPl8_Lvf8XYDVE&s=3DO0rkJZR_aaIof=
0dIodXd5idiRLWSElNAqBXGdXD5vGc&e=3D=20
).

On Sun, Jan 12, 2020 at 2:48 PM Poekilopleuron <[email protected]>
wrote:

> Good day to all listmembers, I would like to ask, what is the current
> evidence for the presence and orientation of shoulder spines in various
> stegosaur taxa? Thank you in advance! Tom
>

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<div dir=3D"ltr">There are two possible orientations, upward and downward, =
for the parascapular spines of=C2=A0<i>Gigantspinosaurus</i> and <i>Yingsha=
nosaurus.</i>=C2=A0Both have spines with large, flattened bases. It seems m=
ost likely that the base lay flat across the scapula, with the spine itself=
 pointing either up or down. Tracy Ford made a diagram showing the orientat=
ions for <i>Gigantspinosaurus </i>(<a href=3D"https://urldefense.proofpoint=
.com/v2/url?u=3Dhttp-3A__www.paleofile.com_Dinosaurs_Armor_Gigantospinosaur=
us.asp&amp;d=3DDwMFaQ&amp;c=3DclK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&a=
mp;r=3DRy_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&amp;m=3DprJMwmK-z3m83zV9=
UNF79HBhREptfJPl8_Lvf8XYDVE&amp;s=3DAe00fPWOQixfuvouXx3qNDd1IGxgTZVPGN-FuOO=
W6no&amp;e=3D">http://www.paleofile.com/Dinosaurs/Armor/Gigantospinosaurus.=
asp</a>) and I made one for <i>Yingshanosaurus </i>(<a href=3D"https://urld=
efense.proofpoint.com/v2/url?u=3Dhttps-3A__incertaesedisblog.wordpress.com_=
yingshanosaurus-2Dparascapular-2Dspines_&amp;d=3DDwMFaQ&amp;c=3DclK7kQUTWtA=
VEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&amp;r=3DRy_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1=
CYJgFW9SI&amp;m=3DprJMwmK-z3m83zV9UNF79HBhREptfJPl8_Lvf8XYDVE&amp;s=3DO0rkJ=
ZR_aaIof0dIodXd5idiRLWSElNAqBXGdXD5vGc&amp;e=3D">https://incertaesedisblog.=
wordpress.com/yingshanosaurus-parascapular-spines/</a>).</div><br><div clas=
s=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Sun, Jan 12, 202=
0 at 2:48 PM Poekilopleuron &lt;<a href=3D"mailto:[email protected]=
" target=3D"_blank">[email protected]</a>&gt; wrote:<br></div><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:=
1px solid rgb(204,204,204);padding-left:1ex">Good day to all listmembers, I=
 would like to ask, what is the current evidence for the presence and orien=
tation of shoulder spines in various stegosaur taxa? Thank you in advance! =
Tom<br>
</blockquote></div>

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