Sea urchin and other Cretaceous fossils - The Netherlands

[Fossilsforever]

Found these fossils: one sea urchin, belemnites (mainly Belemnella (Pachybelemnella) obtusa (Schulz, 1979) and/or sumensis and Belemnitella cf. minor II (Christensen, 1995) and one oyster (Pycnodonte vesicularis (Lamarck, 1806). 

Could anyone help me to determine the sea urchin?

I think Hemiaster aquisgranensis (Schlüter, 1899)?

Found in the ground around the Gulpen Formation (Cretaceous, late late Campanian, early Maastrichtian). 

 

Edited August 26, 2021 by Fossilsforever

[Tidgy's Dad]

Can't help, but nice finds! 

Edited August 26, 2021 by Tidgy's Dad

[FossilDAWG]

Nice! 

Out of curiosity how do you tell Belemnitella minor from B. junior, B. mucronata etc?  Are you going off the stratigraphy?  I have several belemnites I collected (many years ago) from ENCI and from the hill below the castle in Valkenburg, and I have never been 100% confident about how to ID them to species.  Every new paper I find seems to include more species from the area.

 

I don't know about the echinoid.  Unfortunately all I ever found was Hemipneustus.  I recall, though, that there is a relatively recent paper on the Maastricht echinoids.  If I can find it again I'll send it to you.

 

Don

[piranha]

4 hours ago, FossilDAWG said:

I recall, though, that there is a relatively recent paper on the Maastricht echinoids. 

 

 

This large monograph looks very impressive:

 

Jagt, J.W.M. 2000

Late Cretaceous-Early Palaeogene Echinoderms and the K/T Boundary

in the Southeast Netherlands and Northeast Belgium–Part 4: Echinoids.

Scripta Geologica, 121:181-375  PDF LINK

[FossilDAWG]

That's the one!  Thanks!

 

Don

[JohnJ]

6 hours ago, Fossilsforever said:

Could anyone help me to determine the sea urchin?

 

Compare your echinoid to the Diplodetus species.

[caterpillar]

I agree for Diplodetus