Help me with Cretaceous fishes

[Godofgods]

Hi everyone, i'm doing the thesis of master degree in paleontology and I'm studying a new internal lagoon near a carbonate platform. At this moment I can't go to university because we are in quarantine and therefore I can't consult with the professors and can't use various methods. So I ask you for help. Can anyone identify these fish, even just the family they belong to? They are all from the Turonian and they come from a kind of Plattenkalk and represent the only vertebrates found.

Thank you

 

 

 

[jpc]

I am curious as to why you can't ask your professor.  It seems all the profs here are teaching via the internet these days.

 

No, I do not know these fish, sorry.  

[Fossildude19]

@oilshale

[oilshale]

Hmm, I don't know. Looks like something resembling Leptolepides.   But this fish only exists up to the Aptian and not the Turonian.

[Fossildude19]

Where were these found? Country, county, state, or region?

 

What Formation were they found in?

[Godofgods]

Could they belong to the family of Clupeidae?

[Tribal1990]

"They are all from the Turonian and they come from a kind of Plattenkalk"

 

Cool! How do you know that the fish fossils are from the Turonian (upper cretaceous)? They look like Leptolepides (https://www.gbif.org/species/5816810), a genus which existed up to the lower cretaceous (as far as I know). The stone with dendrites looks like Solnhofen material (upper jurassic). The two other stones could also be from a "Solnhofener Plattenkalk" quarry. Could you show us "overview pictures" of the stone plates?   

 

"[...] and represent the only vertebrates found."

 

That´s interesting. Is this an information of the person who found/ excavated the fish fossils?

 

 

 

 

 

 

 

 

[Godofgods]

On 10/4/2020 at 2:14 PM, Tribal1990 said:

 

Cool! How do you know that the fish fossils are from the Turonian (upper cretaceous)?

 

we know this because we have studied the foraminifers contained in the rocks and they are from Turonian.

 

On 10/4/2020 at 2:14 PM, Tribal1990 said:

Could you show us "overview pictures" of the stone plates?   

at this moment i can't take pictures, sorry

[Tribal1990]

Biostratigraphy based on microfossils (e.g. coccolithophores, foraminifera, radiolarians) is very interesting. Recently I found an amazing website which provides a guide to the biodiversity and taxonomy of microfossils:

http://www.mikrotax.org/Nannotax3/index.php?dir=Coccolithophores

 

Could you please tell me/us, which foraminifera taxa can be used as index fossils for the Turonian? mikrotax.org puts e.g. Falsotruncana into the Turonian stage: http://www.mikrotax.org/pforams/index.php?taxon=Falsotruncana&module=pf_mesozoic#rangedata

 

I am also interested in foraminifera taxa that can be used as index fossils for the upper jurassic (I live in the area of the Solnhofener Plattenkalk, Bavaria, Germany). mikrotax.org "says" Globugerina and Conoglobigerina:

http://www.mikrotax.org/pforams/index.php?taxon=Conoglobigerinidae&module=pf_mesozoic#rangedata

 

Do you know further foraminifera taxa that are restricted to upper jurassic sediments (and the relevant literature)?

 

Kind regards

Martin

 

 

[Coco]

Hi,

 

@Foram-Mike

 

Coco