Large intercentrum and small pleurocentrum paired up.
Equal contributions of intercentrum and pleurocentrum,
Centrum is composed of a single unit derived from the intercentrum.
Rhachitomous, embolomerous, and/or stereospondylous
Centrum is composed almost entirely of the Pleurocentrum and is spool-shaped with a central canal perforated by the notochord.
concave anterior, convex posterior
convex anterior and concave posterior
both ends saddle shaped
Acoelous and Amphicoelous
withstand compression but restrict movement
Procoelous, Opisthocoelous, and Heterocoelous
greater range of motion. (Hetero- has the most)
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