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Copulation in antiarch placoderms and the origin of gnathostome internal fertilization

Long, John; Mark-Kurik, Elga; Johanson, Zerina; Lee, Michael S Y; Young, Gavin; Min, Zhu; Ahlberg, Per; Newman, Michael; Jones, Roger; den Blaauwen, Jan L; Choo, Brian; Trinajstic, Kate


Reproduction in jawed vertebrates (gnathostomes) involves either external or internal fertilization. It is commonly argued that internal fertilization can evolve from external, but not the reverse. Male copulatory claspers are present in certain placoderms, fossil jawed vertebrates retrieved as a paraphyletic segment of the gnathostome stem group in recent studies. This suggests that internal fertilization could be primitive for gnathostomes, but such a conclusion depends on demonstrating that...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Nature
DOI: 10.1038/nature13825


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