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Mickey Mortimer wrote:
<In the redescription of nodosaurs from the
Albian-Cenomanian of England, the term acoelous is
used to describe vertebrae in a manner similar to that
of amphicoelous, opisthocoelous, etc. What does
acoelous mean? Just to clear things up, from front to
back, I know the following terms mean:
What are amphicoelous, amphiplatyan and platycoelous?>
opisthocoelous- convex-concave "posterior hollow" (_(
procoelous- concave-convex "forward hollow" )_)
amphicoelous- concave-concave "both hollow" )_(
amphiplatyan- flat-flat "both flat" |_|
platycoelous- flat-concave "flat hollow" |_(
'acoelous'- "no hollow" ?- (_)
Could be the same as amphiplatyan, or the unique
morphology as indicated in the posteriormost dorsals
in alvarezsaurs, double convex central facets. I am
not familiar with ankylosaur vertebral morphology, so
excuse my ignorance.
Jaime "James" A. Headden
"Come the path that leads us to our fortune."
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