Bringing Fossils to Life Posted June 2, 2022 Share Posted June 2, 2022 After a lot of research, I made this family tree for all of Cephalopoda. I have posted major resources below. Dates and lots of other stuff: https://paleobiodb.org/#/ Mass Extinction events https://samnoblemuseum.ou.edu/understanding-extinction/mass-extinctions/end-ordovician-extinction/ https://samnoblemuseum.ou.edu/understanding-extinction/mass-extinctions/late-devonian-extinctions/ Ammonoid classification: https://www.researchgate.net/publication/292489944_Fossil_Focus_Ammonoids Extinction of the Goniatites: https://www.nationalgeographic.com/history/article/121018-triassic-extinctions-hot-global-warming-science-environment Evolution of non-octobranchian coleoids: https://www.researchgate.net/publication/257132699_Longibelus_gen_nov_A_new_Cretaceous_coleoid_genus_linking_Belemnoidea_and_early_Decabrachia Evolution of octobranchians: https://static-content.springer.com/esm/art%3A10.1038%2Fs41467-022-28333-5/MediaObjects/41467_2022_28333_MOESM1_ESM.pdf https://www.nature.com/articles/s41467-022-28333-5 Extinction of the Ellesmocerids: https://onlinelibrary.wiley.com/doi/full/10.1111/j.1475-4983.2007.00644.x Early Spirulids; https://www.researchgate.net/publication/325588476_An_Early_Triassic_gladius_associated_with_soft_tissue_remains_from_Idaho_USA-a_squid-like_coleoid_cephalopod_at_the_onset_of_Mesozoic_Era And here is the family tree: 6 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted June 3, 2022 Share Posted June 3, 2022 Very interesting. Lots of research went into this, I see. What are the two unlabelled coleod groups that exist today? Squids and cuttlefish? Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Top Trilo Posted June 3, 2022 Share Posted June 3, 2022 This is very interesting, I never knew cephalopods hated mass extinctions and just went extinct during minor ones. Out of the 21 orders that went extinct only 3 died during a mass extinction. “If fossils are not "boggling" your mind then you are simply not doing it right” -Ken (digit) "No fossil is garbage, it´s just not completely preserved” -Franz (FranzBernhard) "With hammer in hand, the open horizon of time, and dear friends by my side, what can we not accomplish together?" -Kane (Kane) "We are in a way conquering time, reuniting members of a long lost family" -Quincy (Opabinia Blues) "I loved reading the trip reports, I loved the sharing, I loved the educational aspect, I loved the humor. It felt like home. It still does" -Mike (Pagurus) “The best deal I ever got was getting accepted as a member on The Fossil Forum. Not only got an invaluable pool of knowledge, but gained a loving family as well.” -Doren (caldigger) "it really is nice, to visit the oasis that is TFF" -Tim (fossildude19) "Life's Good! -Adam (Tidgy's Dad) Link to comment Share on other sites More sharing options...
FranzBernhard Posted June 3, 2022 Share Posted June 3, 2022 3 hours ago, Top Trilo said: Out of the 21 orders that went extinct only 3 died during a mass extinction. I am wondering about the Ammonitida! Franz Bernhard Link to comment Share on other sites More sharing options...
Top Trilo Posted June 3, 2022 Share Posted June 3, 2022 (edited) 23 minutes ago, FranzBernhard said: I am wondering about the Ammonitida! Franz Bernhard Over a year ago I had asked about the exact placement of the Cretaceous, Paleogene border, this thread and @Jeffrey P said, Quote In New Jersey there is the Pinna Layer which lies right above the iridium. This roughly foot thick layer of clay contains a "Cretaceous" fossil assemblage that includes ammonites and baculites (well over a 100 invertebrate species in all) that appear to have survived the asteroid impact for at least a few years though it is unclear how long. It has been theorized that during this time due to the sharp reduction in sunlight, micro organisms were rapidly dying off and sinking down through the water column creating a temporary food surplus for the macro fauna that survived until this food source was exhausted and the entire ecosystem collapsed. Above this layer, fossils are scarce, the beginning of the Paleogene. So I wouldn't be surprised if this existed elsewhere, and possibly longer in other places. Edit: I found this about an area in Denmark. https://www.researchgate.net/publication/261359356_Evidence_for_ammonite_survival_into_the_Danian_Paleogene_from_the_Cerithium_Limestone_at_Stevns_Klint_Denmark Edited June 3, 2022 by Top Trilo 3 “If fossils are not "boggling" your mind then you are simply not doing it right” -Ken (digit) "No fossil is garbage, it´s just not completely preserved” -Franz (FranzBernhard) "With hammer in hand, the open horizon of time, and dear friends by my side, what can we not accomplish together?" -Kane (Kane) "We are in a way conquering time, reuniting members of a long lost family" -Quincy (Opabinia Blues) "I loved reading the trip reports, I loved the sharing, I loved the educational aspect, I loved the humor. It felt like home. It still does" -Mike (Pagurus) “The best deal I ever got was getting accepted as a member on The Fossil Forum. Not only got an invaluable pool of knowledge, but gained a loving family as well.” -Doren (caldigger) "it really is nice, to visit the oasis that is TFF" -Tim (fossildude19) "Life's Good! -Adam (Tidgy's Dad) Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted June 3, 2022 Share Posted June 3, 2022 (edited) "Dead clades walking." They were extinct, just didn't know it yet. Edited June 3, 2022 by Tidgy's Dad 3 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Bringing Fossils to Life Posted June 4, 2022 Author Share Posted June 4, 2022 I'm sorry about Sepiida and Teuthida! Here is an updated version with their labels. Thank you all so much! As Top Trilo said, the Ammonoids survived after the K-T mass extinction, for about 4.3 Ma., or so the PBDB says. I've found to be careful on the PBDB, though, because sometimes they don't update their classification or include Ammonitids with Goniatitic sutures with the Goniatites and greatly lengthen the order's existence. Link to comment Share on other sites More sharing options...
Bringing Fossils to Life Posted June 4, 2022 Author Share Posted June 4, 2022 Also I fixed the misspelling of Cephalopoda ("Cephalpoda"). Link to comment Share on other sites More sharing options...
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