Proterix

Proterix was most likely a burrowing insectivore.^[1] The original reference suggests reduced limbs may be possible, due to the unusually high number of lumbar vertebrae, but cautions that conclusions must be reserved until a complete skeleton is found.^[2] This proposal was exaggerated in a popular science book by Dougal Dixon, which speculated that it may have been a limbless mammal with an armored head.^[3] Though very little of the post-cranial skeleton has been found, this situation is typical for mammals and not an indicator of unusual anatomy.^[4][2]