Data from: Vertebral architecture in the earliest stem tetrapods

Stephanie E. Pierce, Per E. Ahlberg, John R. Hutchinson, Julia L. Molnar, Sophie Sanchez, Paul Tafforeau & Jennifer A. Clack
The construction of the vertebral column has been used as a key anatomical character in defining and diagnosing early tetrapod groups. Rhachitomous vertebrae - in which there is a dorsally placed neural arch and spine, an anteroventrally placed intercentrum and paired, posterodorsally placed pleurocentra - have long been considered the ancestral morphology for tetrapods. Nonetheless, very little is known about vertebral anatomy in the earliest stem tetrapods, as most specimens remain trapped in surrounding matrix,...
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