The Pinecrest Sand Member of the Tamiami Formation is a series of beds which contain an incredible diversity of marine life from the Upper Pliocene ranging from approximately 4.5 to 2.5 million years ago. Primary among the organisms that draw attention to these deposits are the gastropods which are so well preserved that they appear to have just recently washed upon the shore. Although both professional and amateurs have collected from the Sarasota quarries which have mined the mollusk shells for construction for over 50 years, a single monograph has never beeen produced. In addition, I am also picturing gastropods from the Tamiami coral reef facies, the Golden Gate Member which contains some of the same species as the Pinecrest but also many endemics. Although short on description which is essential in peer reviewed scientific publications, I hope this gallery will serve as a guide to those who have trouble in acquiring the few out of date works that have delt with the Pinecrest.
- Album created by MikeR
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- 30 image comments
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Image Comments
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By bthemoose · Posted
@Fin Lover, this ID is based on input that @siteseer provided here:
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By Fin Lover · Posted
Based on the enamel "shelf" on the labial side, I would have IDed this as a retroflexus. May I ask what features indicate desori?
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By Samurai · Posted
Oh! I am so sorry for the late reply as I never got the notification. Sadly I have not, besides a familial (mostly superficial) resemblence to the modern ratfish (probably from the same diet) I have not gotten any clear answers.
Jokes aside, a true Id may never come unless far into the future. I still have hope one day someone can help with this ID.
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By Balance · Posted
Bucket list… only half of one so far. That’s just lovely. It’s absolutely still, “delicate”. I don’t know if that makes sense. Of course it’s delicate, but I just mean its vibe is still contained. The broken pieces, even if large and visibly pretty, are missing the delicacy of a sand dollar. So they feel like a piece of fossil instead of what they are.
Sorry for rambling. Currently looking through your awesome pictures to try and find a new tooth I found.
Jp
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By Fin Lover · Posted
I enjoy finding these teeth because every one of them has had a different variation of the cusps.
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By Notidanodon · Posted
Interesting tooth, cusps remind me of araloselachus from germany
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By Jaybot · Posted
Beautiful tooth! I really like the contrast between the root/enamel.
Also, great photography throughout your album
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By ThePhysicist · Posted
The cusplets are present in all great whites, they are an ontogenetic feature and not geographically restricted. Nice tooth, it looks like a juvenile lower lateral. See below for an idea of the neonate dentition.
^ Tomita, Taketeru et al. “Dental ontogeny of a white shark embryo.” Journal of morphology vol. 278,2 (2017): 215-227. doi:10.1002/jmor.20630
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