Jaime Posted February 25, 2021 Share Posted February 25, 2021 Hi guys, Could Any one help to ID this ammonite? It Is from Baja California, México. It measure 500 x 450 mm. It weights over 60 Kg. I bought it, so i have no More data than the state, sorry... Thank you!! Regards! 1 Link to comment Share on other sites More sharing options...
Creek - Don Posted February 25, 2021 Share Posted February 25, 2021 Lots of big Pachydiscus catarinae are discovered there so these are Pachydiscus species. Link to comment Share on other sites More sharing options...
Ludwigia Posted February 25, 2021 Share Posted February 25, 2021 Looks like a Pachydiscus. Perhaps P.catarinae from the Cretaceous Rosario Formation. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
FossilDAWG Posted February 25, 2021 Share Posted February 25, 2021 I agree with Pachydiscus, likely P. catarinae from the Rosario Formation as has been suggested. Nice fossil! You are lucky to have acquired this, as exporting fossils from Mexico is now forbidden. I assume yours is from an old collection. Don 1 Link to comment Share on other sites More sharing options...
Oxytropidoceras Posted February 26, 2021 Share Posted February 26, 2021 4 hours ago, Ludwigia said: Looks like a Pachydiscus. Perhaps P.catarinae from the Cretaceous Rosario Formation. Descriptions of various species of Pachydiscus are in: Kennedy, W.J. and Cobban, W.A., 1999. Pachydiscus (Pachydiscus) hornbyense Jones, 1963, and P.(P.) catarinae (Anderson & Hanna, 1935)(Cretaceous, Campanian, Ammonoidea). Pacific Realm marker fossils in the Western Interior Seaway of North America: Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre, 69, pp.119-127. PDF file: http://biblio.naturalsciences.be/rbins-publications/bulletin-of-the-royal-belgian-institute-of-natural-sciences-earth-sciences/69-sup-a-1999/irscnb_p4087_014db6p_69-supa_bulletin-8.pdf Contents: https://biblio.naturalsciences.be/rbins-publications/bulletin-of-the-royal-belgian-institute-of-natural-sciences-earth-sciences/bulletin-of-the-royal-belgian-institute-of-natural-sciences-earth-sciences/kennedy_pachydiscus_1999 https://biblio.naturalsciences.be/rbins-publications/bulletin-of-the-royal-belgian-institute-of-natural-sciences-earth-sciences/bulletin-of-the-royal-belgian-institute-of-natural-sciences-earth-sciences Also, go see Anderson, F.M. and Hanna, G.D., 1935. Cretaceous geology of lower California, Proceedings of the California Academy of Sciences, 4th series. (Vol. 23, No. 1). https://www.biodiversitylibrary.org/page/3188207#page/33/mode/1up https://www.biodiversitylibrary.org/page/3188207#page/46/mode/1up https://www.biodiversitylibrary.org/page/3188207#page/49/mode/1up https://www.biodiversitylibrary.org/part/21372 https://www.biodiversitylibrary.org/itemdetails/22493 Yours, Paul H. Link to comment Share on other sites More sharing options...
Jaime Posted March 8, 2021 Author Share Posted March 8, 2021 On 2/25/2021 at 8:45 PM, Oxytropidoceras said: Hi Paul, Thank you very much ! i will read all the references. Awesome! Best regards! Link to comment Share on other sites More sharing options...
Jaime Posted March 8, 2021 Author Share Posted March 8, 2021 On 2/25/2021 at 4:23 PM, Creek - Don said: Lots of big Pachydiscus catarinae are discovered there so these are Pachydiscus species. Thank you very much!! Link to comment Share on other sites More sharing options...
Jaime Posted March 8, 2021 Author Share Posted March 8, 2021 On 2/25/2021 at 4:24 PM, Ludwigia said: Looks like a Pachydiscus. Perhaps P.catarinae from the Cretaceous Rosario Formation. Thank you!! Regards! Link to comment Share on other sites More sharing options...
Boesse Posted March 8, 2021 Share Posted March 8, 2021 Just important to note that Mexico does not permit the export of fossils from anywhere in the country. Link to comment Share on other sites More sharing options...
Jaime Posted March 8, 2021 Author Share Posted March 8, 2021 On 2/25/2021 at 5:32 PM, FossilDAWG said: I agree with Pachydiscus, likely P. catarinae from the Rosario Formation as has been suggested. Nice fossil! You are lucky to have acquired this, as exporting fossils from Mexico is now forbidden. I assume yours is from an old collection. Don Thanks a lot! Regards!! Link to comment Share on other sites More sharing options...
Jaime Posted March 8, 2021 Author Share Posted March 8, 2021 2 minutes ago, Boesse said: Just important to note that Mexico does not permit the export of fossils from anywhere in the country. Thank you! Yes Im aware, this piece is in Mexico. Regards! Link to comment Share on other sites More sharing options...
Boesse Posted March 8, 2021 Share Posted March 8, 2021 Oh! Sorry, I saw your location is marked as "Texas" on your profile. Link to comment Share on other sites More sharing options...
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