A new, complete family tree of Cephalopoda

[Bringing Fossils to Life]

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:

 

 

[Tidgy's Dad]

Very interesting. Lots of research went into this, I see. 

What are the two unlabelled coleod groups that exist today? Squids and cuttlefish?   

[Top Trilo]

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.

[FranzBernhard]

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

[Top Trilo]

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

[Tidgy's Dad]

"Dead clades walking." 

They were extinct, just didn't know it yet. 

Edited June 3, 2022 by Tidgy's Dad

[Bringing Fossils to Life]

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.

[Bringing Fossils to Life]

Also I fixed the misspelling of Cephalopoda ("Cephalpoda").