Editing Seminal vesicles (section)

==Other animals==
The evolution of seminal vesicles may have been influenced by [[sexual selection]].<ref name=":1" /> They occur in birds and reptiles<ref>{{Cite book |last=Gill |first=Frank B. |url=https://books.google.com/books?id=jFfs1jsPfwgC&dq=%22seminal+vesicles%22+birds&pg=PA354 |title=Ornithology |date=1995 |publisher=Macmillan |isbn=978-0-7167-2415-5 |language=en}}</ref> and many groups of mammals,<ref name="Kardong2019" /> but are absent in [[marsupial]]s,<ref>{{Cite book |last1=Tyndale-Biscoe |first1=C. Hugh |url=https://books.google.com/books?id=HpjovN0vXW4C&pg=PA147 |title=Reproductive Physiology of Marsupials |last2=Renfree |first2=Marilyn |date=1987-01-30 |publisher=Cambridge University Press |isbn=978-0-521-33792-2 |language=en}}</ref><ref>{{Cite book |last1=Vogelnest |first1=Larry |url=https://books.google.com/books?id=p8cDEAAAQBAJ&pg=PA141 |title=Medicine of Australian Mammals |last2=Woods |first2=Rupert |date=2008-08-18 |publisher=Csiro Publishing |isbn=978-0-643-09797-1 |language=en}}</ref> [[monotreme]]s, and [[Carnivora|carnivorans]].<ref name="Marx2009" /><ref name=":1">Dixson, Alan F. "[https://www.researchgate.net/profile/Alan_Dixson/publication/13533816_Sexual_Selection_and_Evolution_of_the_Seminal_Vesicles_in_Primates/links/54e14b5f0cf2953c22ba95c2/Sexual-Selection-and-Evolution-of-the-Seminal-Vesicles-in-Primates.pdf Sexual selection and evolution of the seminal vesicles in primates]." Folia Primatologica 69.5 (1998): 300-306.</ref> The function is similar in all mammals they are present in, which is to secrete a fluid as part of semen that is ejaculated during the sexual response.<ref name=Kardong2019>{{cite book |last1=Kardong |first1=Kenneth |title=Vertebrates : comparative anatomy, function, evolution |date=2019 |publisher=McGraw-Hill |location=New York |isbn=9781260092042 |edition=8th|section=Reproductive system|page=564}}</ref>