Vertebral architecture in the earliest stem tetrapods

  title={Vertebral architecture in the earliest stem tetrapods},
  author={Stephanie E Pierce and Per Erik Ahlberg and John R Hutchinson and Julia L. Molnar and Sophie Sanchez and Paul Tafforeau and 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, because most specimens remain trapped… CONTINUE READING
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