Re: Acoelous?

["Jaime A. Headden" <qilongia@yahoo.com>]

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:

opisthocoelous- convex-concave
procoelous- concave-convex

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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