Nimravis Posted February 3, 2019 Share Posted February 3, 2019 I have had this sand dollar in my collection for forever, I alway keep it with a modern one. I have no info on it and it was given to me from a friend. Any ID and possible location would be appreciated. Link to comment Share on other sites More sharing options...
ynot Posted February 3, 2019 Share Posted February 3, 2019 The darker one looks like a dendraster from the pacific coast. What think You @Coco 2 Darwin said: " Man sprang from monkeys." Will Rogers said: " Some of them didn't spring far enough." My Fossil collection - My Mineral collection My favorite thread on TFF. Link to comment Share on other sites More sharing options...
Coco Posted February 3, 2019 Share Posted February 3, 2019 Thanks Ynot for calling me. Yes, second one is Dendraster. For the 1st one I think it is Mellita quinquiesperforata (mines are from SC). Minravis, you have a recent sea urchins collection ? Coco 3 ---------------------- 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...
Nimravis Posted February 3, 2019 Author Share Posted February 3, 2019 3 hours ago, Coco said: Thanks Ynot for calling me. Yes, second one is Dendraster. For the 1st one I think it is Mellita quinquiesperforata (mines are from SC). Minravis, you have a recent sea urchins collection ? Coco Thanks Coco and no I do not. The top one is not a fossil, it is a recent Sand dollar, I just keep them together. Link to comment Share on other sites More sharing options...
Coco Posted February 3, 2019 Share Posted February 3, 2019 OK, I supposed Dendraster is fossil, it is the reason why I didn't give a species name, I only know the recent ones. 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...
caldigger Posted February 3, 2019 Share Posted February 3, 2019 The ones from the central coast of California I have found are Dendaster ashleyi. Pliocene approx. 5mya 1 Link to comment Share on other sites More sharing options...
abyssunder Posted February 3, 2019 Share Posted February 3, 2019 I numbered, there are five perforations. There might be fossil Mellita quinquiesperforata, although is extant. " The occurrence of fossils of Mellita quinquiesperforata is also confirmed." - according to R.Lopes. 2011. Fossil sand dollars (Echinoidea, Clypeasteroida) from the Southern Brazilian coast. Rev. bras. paleontol. 14(3): 201-214 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
Nimravis Posted February 3, 2019 Author Share Posted February 3, 2019 41 minutes ago, Coco said: OK, I supposed Dendraster is fossil, it is the reason why I didn't give a species name, I only know the recent ones. Coco Correct Coco, the second one is definitely a fossil and I will look up the info- thanks. Link to comment Share on other sites More sharing options...
abyssunder Posted February 4, 2019 Share Posted February 4, 2019 Could you show the fractured surface of the broken margins of the first specimen? " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
siteseer Posted June 12, 2022 Share Posted June 12, 2022 On 2/3/2019 at 3:07 PM, Nimravis said: Correct Coco, the second one is definitely a fossil and I will look up the info- thanks. The second one might be from the Pliocene Etchigoin Formation, Kettleman Hills, CA. If you drop a little vinegar on it and some oil comes off, it might be from there. I've seen similar preservation with Dendraster from the Chula Vista area, San Diego County, CA. Link to comment Share on other sites More sharing options...
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