Sacha Posted December 9, 2018 Author Share Posted December 9, 2018 The latest update from UF now that they have the specimens in hand. The Oligocene specimens were what we suspected but the sand dollars are E. tamiamiensis. However, they are a bit atypical for the species given the very thin test. Based on the curved anterior petals rather than straight petals, size, and depth of the invaginations, they are E. tamiamiensis. 3 Link to comment Share on other sites More sharing options...
Bob Saunders Posted August 30, 2021 Share Posted August 30, 2021 Keyhole sand dollasr Echinodiscus sp. #1 arrow head type. Fossil sand dollar Encope tamiamiensis (Mansfield, 1932) 3 cm "extinct" from the upper Pliocene (5.4-2.4 million years ago) Tamiami Fm. of Charlotte County, Florida. This is a exquisitely preserved fossil "sand dollar" of the species Encope tamiamiensis. and dates to the late Miocene through Pliocene periods. #2 Encope micropora? 2.8 cm They come from a garage sale jar of seashells. 1 Link to comment Share on other sites More sharing options...
Al Dente Posted August 30, 2021 Share Posted August 30, 2021 1 hour ago, Bob Saunders said: Keyhole sand dollasr Echinodiscus sp. #1 arrow head type. Fossil sand dollar Encope tamiamiensis (Mansfield, 1932) 3 cm "extinct" from the upper Pliocene (5.4-2.4 million years ago) Tamiami Fm. of Charlotte County, Florida. This is a exquisitely preserved fossil "sand dollar" of the species Encope tamiamiensis. and dates to the late Miocene through Pliocene periods. #2 Encope micropora? 2.8 cm They come from a garage sale jar of seashells. These look like modern Encope and Mellita sand dollars. I'm guessing they are Mellita isometra and Encope michelini. 1 1 Link to comment Share on other sites More sharing options...
Bob Saunders Posted August 31, 2021 Share Posted August 31, 2021 13 hours ago, Al Dente said: These look like modern Encope and Mellita sand dollars. I'm guessing they are Mellita isometra and Encope michelini. Thanks and I added to my notes. How do you tell the modern from a fossil ones? Link to comment Share on other sites More sharing options...
Coco Posted August 31, 2021 Share Posted August 31, 2021 Hi, I think the two last pictures are current because they still have bristles (very fine needles) present in the holes/lunules. Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
Al Dente Posted August 31, 2021 Share Posted August 31, 2021 28 minutes ago, Bob Saunders said: Thanks and I added to my notes. How do you tell the modern from a fossil ones? 25 minutes ago, Coco said: I think the two last pictures are current because they still have bristles (very fine needles) present in the holes/lunules. I agree with Coco. The tiny spines are still attached. Usually these drop off within a short time after the sand dollar dies. Link to comment Share on other sites More sharing options...
Bob Saunders Posted August 31, 2021 Share Posted August 31, 2021 Thanks for the word, The third one is so dry it is now three pieces. I may affix it to a thin card with white glue or just leave it. Other than a shallow tight covered holder for each is their a way to preserve them? Link to comment Share on other sites More sharing options...
Harry Pristis Posted August 31, 2021 Share Posted August 31, 2021 This turned into an "Encope" thread, so I thought I'd share some NOT from the Peace River. I have duplicates of these. http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
Harry Pristis Posted August 31, 2021 Share Posted August 31, 2021 Here is the most common South Florida variety of Encope: http://pristis.wix.com/the-demijohn-page What seest thou else In the dark backward and abysm of time? ---Shakespeare, The Tempest Link to comment Share on other sites More sharing options...
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