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13 terms

Chapter 8

Chapter 8 Leary
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Rhachitomous
Large intercentrum and small pleurocentrum paired up.
Embolomerous
Equal contributions of intercentrum and pleurocentrum,
Stereospondylous
Centrum is composed of a single unit derived from the intercentrum.
Aspidospondylous condition
Rhachitomous, embolomerous, and/or stereospondylous
Lepospondylous
Centrum is composed almost entirely of the Pleurocentrum and is spool-shaped with a central canal perforated by the notochord.
Holospondylous
Lepospondylous
Acoelous
flat centra
Amphicoelous
concave centra
Procoelous
concave anterior, convex posterior
Opisthocoelous
convex anterior and concave posterior
Heterocoelous
both ends saddle shaped
Acoelous and Amphicoelous
withstand compression but restrict movement
Procoelous, Opisthocoelous, and Heterocoelous
greater range of motion. (Hetero- has the most)