Spotted hyena (Crocuta crocuta). Photo © David Bygott · Flickr · CC BY-NC-SA 2.0
The difference between anatomical origin and evolved application is exemplified by the peniform clitoris of the spotted hyena.
This clitoris resembles the penis more than in any other mammal, but emulates the penis even less than does the typical mammalian clitoris.

Figure 1. Pseudopenis of spotted hyena (Crocuta crocuta). Photo by Oliver Honer
Robin and the Honey Badger, 22 March 2016
