Eikel: Verskil tussen weergawes

’n Groot verskeidenheid vorms word by die eikel van diere aangetref. Sommige beslaan feitlik die heltehelfte van die penis, terwyl ander klein en stekelrig is.<ref name="1986Köhncke">{{cite journal | last1 = Köhncke | first1 = M. | last2 = Leonhardt | first2 = K. | title = ''Cryptoprocta ferox'' | journal = Mammalian Species | issue = 254 | pages = 1–5 | year = 1986 | url = http://www.science.smith.edu/departments/Biology/VHAYSSEN/msi/pdf/i0076-3519-254-01-0001.pdf | format = PDF | accessdate = 19 May 2010}}</ref>