drbush Posted October 31, 2018 Share Posted October 31, 2018 Dear friends can you help me with this? It is a large gastropod. Pterocera ? It was a surface find near the city of Rmah 50 km to the east of Riyadh city, the capital of Saudi Arabia. The area is Cretaceous, Aruma Formation, the fossil is large, incomplete , internal mold , 11.5 cm long , 7cm wide. 1 Link to comment Share on other sites More sharing options...
Rockwood Posted October 31, 2018 Share Posted October 31, 2018 It's usually extremely difficult to identify gastropods from an internal mold. The ornament that distinguishes them is on the outside of the shell. Perhaps someone will recognize this as a special circumstance where the options are limited, or there is something unique about it though. 3 Link to comment Share on other sites More sharing options...
Raggedy Man Posted October 31, 2018 Share Posted October 31, 2018 Wow thats a big one.. ...I'm back. Link to comment Share on other sites More sharing options...
Nimravis Posted October 31, 2018 Share Posted October 31, 2018 Nice find. Link to comment Share on other sites More sharing options...
abyssunder Posted October 31, 2018 Share Posted October 31, 2018 The Upper Cretaceous gastropod fauna of the Aruma Formation is nicely described in M. Gameil & A.S. El-Sorogy. 2015. Gastropods from the Campanian–Maastrichtian Aruma Formation, Central Saudi Arabia. Journal of African Earth Sciences 103:128-139 . 5 " 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...
drbush Posted November 4, 2018 Author Share Posted November 4, 2018 Good morning , after reading some articles (thank you abyssunder for the informative article) , i think it could be " Campanile giganteum " , am i Wright ? Link to comment Share on other sites More sharing options...
DPS Ammonite Posted November 4, 2018 Share Posted November 4, 2018 Campanile giganteum is an Eocene species while your rocks are Cretaceous. Keep on looking. https://en.m.wikipedia.org/wiki/Campanile_giganteum 2 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...
drbush Posted November 4, 2018 Author Share Posted November 4, 2018 back to the drowning board . Link to comment Share on other sites More sharing options...
abyssunder Posted November 4, 2018 Share Posted November 4, 2018 13 hours ago, drbush said: Good morning , after reading some articles (thank you abyssunder for the informative article) , i think it could be " Campanile giganteum " , am i Wright ? That was my first thought considering its large dimensions, but if you are sure is not transported material from younger strata (e.g. Umm er Rhadhuma Fm. - you said it was a surface find), the possibility of being Campanile sp. may not be excluded, but could be minor. Campanile (or similar) species are known from the lower to upper stages of the Upper Cretaceous of Oman, Egypt, United Arab Emirates - to the Oligocene of Oman. Most of the specimens collected for study from those arid areas lack the external shell morphology (being steinkerns), so it's hard to assign them to a correct taxon. Longitudinal sections may help in the ID, but not in all cases. 2 " 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...
drbush Posted November 5, 2018 Author Share Posted November 5, 2018 I found a similar fossil from the Wright time , could it be Pterocera renewed THOMAS & PÉRON, 1889 Mesozoic , Upper Cretaceous https://science.mnhn.fr/institution/mnhn/collection/f/item/b19214?lang=fr_FR Link to comment Share on other sites More sharing options...
drbush Posted November 12, 2018 Author Share Posted November 12, 2018 Hi I went to the same area and found this large gastropd , 18cm by 10cm on matrix Link to comment Share on other sites More sharing options...
ynot Posted November 13, 2018 Share Posted November 13, 2018 Nice! 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...
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