displasiocoelous
displasiocoelous
"Vertebral column in which the first seven vertebrae have holochordal centra and the intervertebral cartilages are posteriorly subdivided in the procoelous manner. The eighth presacral vertebra has a holochordal centrum and the intervertebral cartilage is subdivided in the opisthocoelous manner. Thus, the first seven presacral vertebrae are concave anteriorly and convex posteriorly, whereas the eighth is biconcave."