Evolution: One Penis After All
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1Department of Biological Sciences, Mount Holyoke College, South Hadley, MA 01075, and Division of Organismal and Evolutionary Biology, University of Massachusetts Amherst, Amherst, MA 01003, USA.
Current Biology : CB
|January 15, 2016
Abstract:
Amniote penises come in many shapes but are missing from the basal tuatara. This has been taken as evidence for multiple evolutionary origins of the penis. Now, genital swellings have been found in tuatara embryos, arguing for a single origin.