-Andy- Posted August 19, 2019 Share Posted August 19, 2019 Hi all, I have fossils from Singapore's Jurong Formation, aged from late Triassic to early Jurassic (235 - 175 mya). Some were found over 10 years ago by a fossil-digger while others were dug up recently by the two of us. Several specimens have been handed over to our local museum. However, no one really knows what family or genus these bivalves belong to. I was hoping you guys could help. Specimen 0A Specimen 0B Specimen 0B alt view Specimen 0B alt view 2 Looking forward to meeting my fellow Singaporean collectors! Do PM me if you are a Singaporean, or an overseas fossil-collector coming here for a holiday! Link to comment Share on other sites More sharing options...
-Andy- Posted August 19, 2019 Author Share Posted August 19, 2019 Specimen 0C Specimen 0C alt view Specimen 0C alt view Specimen 1A Specimen 1A with alt lighting 1 Looking forward to meeting my fellow Singaporean collectors! Do PM me if you are a Singaporean, or an overseas fossil-collector coming here for a holiday! Link to comment Share on other sites More sharing options...
-Andy- Posted August 19, 2019 Author Share Posted August 19, 2019 Specimen 1C Specimen 1C alt view Specimen 1D Specimen 1D alt view 1 Looking forward to meeting my fellow Singaporean collectors! Do PM me if you are a Singaporean, or an overseas fossil-collector coming here for a holiday! Link to comment Share on other sites More sharing options...
caldigger Posted August 19, 2019 Share Posted August 19, 2019 Let's try Mr. Bivalve himself. @Max-fossils 1 Link to comment Share on other sites More sharing options...
Max-fossils Posted August 25, 2019 Share Posted August 25, 2019 On 8/19/2019 at 7:53 PM, caldigger said: Let's try Mr. Bivalve himself. @Max-fossils Thanks for the tag, but these little dudes are way too old for me! I'm sorry Andy, but I've got no clue for those cool bivalves, can't recognize any. However what might be helpful is to try to get a specimen (of any of the species) completely out of the matrix so that a good overall view of the shell's anatomy can be obtained (especially of the hinge!), but looking at your photos I'm afraid that this may be extremely hard to do due to the matrix's hardness. Maybe the museum you sent the specimens to has some really good prepping tools (or other types of tools) that will make us able to see what kinds of hinges we got? Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
westcoast Posted August 25, 2019 Share Posted August 25, 2019 I doubt that any of these are preserved well enough to give a confident ID Link to comment Share on other sites More sharing options...
-Andy- Posted September 9, 2019 Author Share Posted September 9, 2019 On 26/08/2019 at 5:05 AM, Max-fossils said: Thanks for the tag, but these little dudes are way too old for me! I'm sorry Andy, but I've got no clue for those cool bivalves, can't recognize any. However what might be helpful is to try to get a specimen (of any of the species) completely out of the matrix so that a good overall view of the shell's anatomy can be obtained (especially of the hinge!), but looking at your photos I'm afraid that this may be extremely hard to do due to the matrix's hardness. Maybe the museum you sent the specimens to has some really good prepping tools (or other types of tools) that will make us able to see what kinds of hinges we got? On the contrary, the matrix is so fragile and flaky that I see pieces dropping out each time I handle them. I dare not get any specimens outta the matrix. I've got only one answer so far from Facebook - Lima sp. pelecypod The museum is at a loss too since they have never dealt with Singapore fossils before Looking forward to meeting my fellow Singaporean collectors! Do PM me if you are a Singaporean, or an overseas fossil-collector coming here for a holiday! Link to comment Share on other sites More sharing options...
DPS Ammonite Posted September 9, 2019 Share Posted September 9, 2019 I found a reference that shows a few fossils from the Jurong Fm. Look for the references mentioned about the Jurong. Also contact the Lee Kong Chian Natural Museum for help. My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
-Andy- Posted September 10, 2019 Author Share Posted September 10, 2019 On 09/09/2019 at 11:35 PM, DPS Ammonite said: I found a reference that shows a few fossils from the Jurong Fm. Look for the references mentioned about the Jurong. Also contact the Lee Kong Chian Natural Museum for help. Hi, I can't see any link. We are in talks with the LKC Museum. Looking forward to meeting my fellow Singaporean collectors! Do PM me if you are a Singaporean, or an overseas fossil-collector coming here for a holiday! Link to comment Share on other sites More sharing options...
Max-fossils Posted September 14, 2019 Share Posted September 14, 2019 On 9/9/2019 at 4:58 PM, -Andy- said: Lima sp. pelecypod Mwah, that's a pretty bad answer. Pelecypod is a really old name for bivalve and no longer used. Also, if you google "Lima shell", you'll see that the shell doesn't look much like the fossils you have. Lima is quite a famous genus, and I've often seen people classify random bivalves as "Lima" just because that's the only bivalve genus they know If I were you I would dismiss that answer, doesn't sound very researched to me. Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
DPS Ammonite Posted September 14, 2019 Share Posted September 14, 2019 33 minutes ago, Max-fossils said: Mwah, that's a pretty bad answer. Pelecypod is a really old name for bivalve and no longer used. Also, if you google "Lima shell", you'll see that the shell doesn't look much like the fossils you have. Limas have pronounced radial ribs; these do not. I agree that that Pelecypoda is not the preferred term, however it is still used and you should know that it is a synonym for bivalves. https://pubs.er.usgs.gov/publication/pp1228B My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
Max-fossils Posted September 14, 2019 Share Posted September 14, 2019 Just now, DPS Ammonite said: Limas have pronounced radial ribs; these do not. I agree that that Pelecypoda is not the preferred term, however it is still used and you should know that it is a synonym for bivalves. https://pubs.er.usgs.gov/publication/pp1228B I agree, the shell shown here doesn't fit with Lima, for several reasons. However the class' name is Bivalvia, and no longer Pelecypoda, so that term shouldn't be used anymore. It would be like referring to the meg as "Carcharocles megalodon" instead of Otodus megalodon. The link you sent is from a paper published in 1984, which does date to 35 years back, a time where Pelecypoda was used more frequently. Max Derème "I feel an echo of the lightning each time I find a fossil. [...] That is why I am a hunter: to feel that bolt of lightning every day." - Mary Anning >< Remarkable Creatures, Tracy Chevalier Instagram: @world_of_fossils Link to comment Share on other sites More sharing options...
DPS Ammonite Posted September 14, 2019 Share Posted September 14, 2019 Use the newer terms; know the older terms. Everyone should know that pelecypods are bivalves so that you can find older and sometimes newer literature. (It is sort of like knowing what an icebox is.) Same thing for Carcharocles. Google Scholar still notes usage of pelecypod in recent literature. https://scholar.google.com/scholar?as_ylo=2015&q=pelecypod&hl=en&as_sdt=0,5 It does look like usage of pelecypod decreased rapidly after the 80s: link My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
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