luluboo1 Posted August 23 Share Posted August 23 Please help. Are these occipitals of a Protosiren? They were collected from the Crystal River in Ocala by a diver. I've had them for years. Now I'm wondering if I'm lucky enough to have two specimens of a super rare sirenian. 1 Link to post Share on other sites
Fossildude19 Posted August 24 Share Posted August 24 Views and labels showing which sides are which would be helpful, along with a ruler, for scale. @Boesse 1 Link to post Share on other sites
Mahnmut Posted August 24 Share Posted August 24 Hi, the smooth ("lissencephalic") shape of the inner cranial surface fits what I know of sirenians. No idea on species level. I think your specimens are mainly parietals (see last graphic in this link:) http://what-when-how.com/marine-mammals/sirenian-evolution-marine-mammals/ Best Regards, J 1 Link to post Share on other sites
luluboo1 Posted August 25 Author Share Posted August 25 Thanks guys. Your link led me to clear pics of protosiren parietal. They match perfectly. Thx again. Link to post Share on other sites
Boesse Posted August 26 Share Posted August 26 Not Protosiren, since Protosiren is from the Eocene; this is probably a dugongid skullcap. Crystal River, if memory serves, produces vertebrate fossils that are chiefly Miocene and Pleistocene in age. 2 Link to post Share on other sites
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