The Mammary Gland and Its Origin During Synapsid Evolution

@article{Oftedal2004TheMG,
  title={The Mammary Gland and Its Origin During Synapsid Evolution},
  author={O. Oftedal},
  journal={Journal of Mammary Gland Biology and Neoplasia},
  year={2004},
  volume={7},
  pages={225-252}
}
  • O. Oftedal
  • Published 2004
  • Biology, Medicine
  • Journal of Mammary Gland Biology and Neoplasia
Lactation appears to be an ancient reproductive trait that predates the origin of mammals. The synapsid branch of the amniote tree that separated from other taxa in the Pennsylvanian (>310 million years ago) evolved a glandular rather than scaled integument. Repeated radiations of synapsids produced a gradual accrual of mammalian features. The mammary gland apparently derives from an ancestral apocrine-like gland that was associated with hair follicles. This association is retained by monotreme… Expand
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