Vertebral Intercentra in Lacertidae: Variation and Phylogenetic Implications
The existence of both interspecific and intraspecific morphological and anatomical variation in vertebral intercentra is described for the first time in Lacertidae. A sample of 380 cleared-and-stained specimens of 12 species of lacertid lizards reveals also the presence of thoracolumbar intercentra in Lacertidae, a condition previously reported within Squamata only for the families Xantusiidae and Gekkonidae. The significance of these findings in the context of phylogenetic analyses within Squamata is discussed.Abstract

Drawing representing a ventral view of the vertebral column of the specimen UAM.R.Q-43 showing morphology of intercentra 2 to 8

Photograph of the vertebral column (ventral view) of the specimen UAM.R.Q-43 showing morphology and distribution of intercentra 8 to 10

Drawing representing a ventral view of the vertebral column of the specimen UAM.R.Q-43 showing morphology and distribution of intercentra 10 to 14

Drawing of the vertebral column (ventral view) of the specimen UAM.R.Q-43 showing morphology and distribution of intercentra 25 to 29