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>>_Saurexallopus_ is a Maastrichtian-aged ichnogenus originally
described in ?1995 by Jerry Harris and some of his/my crazy friends.
I am not sure about the spelling, but it is close. <<
'Twas '96, and you spelled it correctly! Lest list members forget,
ichnotaxa are quite distinct from body fossil taxa, so there is no animal
called _Saurexallopus_...just funky, 4-toed theropod footprints! People
are bound to want ther refs, so here they are:
Harris, J.D., Johnson, K.R., Hicks, J., and Tauxe, L. 1996. Four-toed
theropod footprints and a paleomagnetic age from the Whetstone Falls Member
of the Harebell Formation (Upper Cretaceous: Maastrichtian), northwestern
Wyoming. _Cretaceous Research_ 17: 381-401.
Harris, J.D. 1997. Four-toed theropod footprints and a paleomagnetic age
from the Whetstone Falls Member of the Harebell Formation (Upper
Cretaceous: Maastrichtian), northwestern Wyoming: a correction.
_Cretaceous Research_ 18: 139.
The latter is just a name correction -- I'd originally called the prints
_Exallopus_, but that turned out to have been used for a worm. (Who'd've
thought a worm would have a name meaning "different foot?!?")
>>I recently was part of a
team (1996) that described essentially the same morphotype from the
Maastrichtian-aged Lance Formation (the formation where the first _T.rex_
found) of eastern Wyoming. We are currently writing it up, but it is one
bizzar track. I am talking only about the Lance examples here, but it
kind of like a "theropod" track, except that the toes are very long and
narrow. The digital pads are not sub-circular or such as
they often are in "Theropod" ichnites, but are elongated more along the
of the toes.<<
In my original description, the prints I had to work with weren't
nicely enough preserved to show the digital pads (properly, digital nodes),
so this is news to me! Makes sense, though!
>>There is a very odd hallux that is also very long and
thin. It is essentially a quadrupedal ichnite, rather than a tridactyl
track with a small hallux impression.<<
Before anyone else jumps in confused, methinks Josh typoed here --
that should be "tetradactyl," not "quadrupedal." The tracks, AFAICT, are
from a complete biped.
>>Very very strange critter. We
have nothing in the Lance record that I know of that could be the
trackmaker for this little guy.<<
Or anywhere else, for that matter! There isn't even a good
dinosaur clade for which good foot material is preserved which could have
made the tracks...
____/_\,) .. _
--____-===( _\/ \\/ \-----_---__
/\ ' ^__/>/\____\--------
Jerry D. Harris
Fossil Preparation Lab
New Mexico Museum of Natural History
1801 Mountain Rd NW
Albuquerque NM 87104-1375
Phone: (505) 899-2809
Fax: (505) 841-2866