Help again, Fossil Shark tooth and crinoids

[murseboog]

Hello guys and gals,

I greatly appreciate this forum and thanks for welcoming me. I have a set of 4 teeth that I only know that are from Florida. I’m thinking Carcharias but I’m a noob so I’m not confident. As far as the crinoids, I got them as a “gift” after purchasing a tooth from a dealer. All he knew is they were crinoids from Dakhla, Morocco. I’m guessing Pennsylvanian? Any information would be awesome. Thanks guys/gals

[Max-fossils]

The shark teeth look like they might be Striatolamia macrota. Compare with this picture from Google:

 

As for the crinoids, I'm very confused... You say they are from Dakhla, Morocco (well apparently it's in Western Sahara, but from what I heard that territory is disputed). Well here is a link about that location. I'm confused because in the link it says that the fossils from Dakhla are Paleogene-Neogene, but fossil crinoids like that one (as far as I'm aware) are very uncommon in sediments so "young". Then again I know nothing about crinoids...

 

Best regards,

 

Max

[Miocene_Mason]

Crinoids can be found in younger sediments, but these do appear to be older, probably from someplace in the eastern us, a few places produce these en masse. Pentacrinites is a name that springs to mind for an ID but coloumn sections without the calyx are rarely identifiable.

2 hours ago, Max-fossils said:

Paleogene-Neogene,

Late Cretaceous-late Eocene with a few outcrops of Miocene I believe

[FossilDAWG]

The crinoid stem pieces are typical of Pentacrinites or the similar crinoid Isocrinus.  These fossils can be found in many marine formations from the Triassic to the Eocene.  However I have never seen them from any eastern USA locality. In the USA they are abundant in some Triassic formations in Utah/Wyoming, and they occur in Eocene formations in Washington and Oregon.  They could possibly be found in Paleogene formations in north Africa.

 

Striatolamia is a Paleocene/Eocene genus.  Most of the Florida shark tooth producing formations are younger than this (especially Miocene).  Striatolamia have grooves (striations) on the blade, which are not evident on the teeth in question.  I think they are some type of sand tiger, such as Odontaspis or Carcharias; hopefully others with more familiarity with the Florida sharks can provide suggestions as to species.  The image of "Striatolamia macrota" from the web is, in my opinion, too worn and does not show diagnostic characters.  

 

Don

[Tidgy's Dad]

These 'star crinoid', Pentacrinites pieces are commonly found in the area around Nzala in Morocco associated with small haematite ammonites such as Holcophylloceras sp. They are therefore Middle Jurassic in age. 

Of course they may occur elsewhere in Morocco as well, but this is the only location I know of. 

Dakhla, Western Sahara seems most unlikely. 

[abyssunder]

Not knowing the location and the geological age of your crinoid pluricolumnals it might be difficult to assign them to the Pentacrinidae or Isocrinidae family. What is interesting, is that this specimen is not a columnal, it looks to be a brachial ossicle.