Callovian tubes

[Gen. et sp. indet.]

From a Callovian site in southern Poland I collected a lot od thick-walled tubes. Sometimes they seem to be a part of something bigger, but I mainly search small rocks on heaps so I don't have a more complete picture of the fossil. Associated are various brachiopods, bivalves (including oysters and Ctenostreon), serpulids, ammonites, belemnites and various different fauna.

I think these are clearly not belemnites. I don't think these are crinoids.

I consider bivalve fragments (e.g. spines of Ctenostreon) or some huge serpulids.

Any ideas?

Specimen No. 1:

Specimen No. 2:

[Miocene_Mason]

Random guess: Scaphopod? 

[Gen. et sp. indet.]

Too big, too thick, not known from the site, the tubes seem to be parts of something bigger.

[doushantuo]

random guess:Lukow?

I'd go for serpulid,myself

[Gen. et sp. indet.]

Actually, the two specimens come from two different parking lots, from rocks that were brought, I suppose, from Zalas site.

[Arizona Chris]

If I found something like that in a marine deposit, my first impression on the top image is that it would be a gastropod in that the right "tube" is larger than the left side.  Maybe one coil?  But that second and third image of that larger specimen is quite interesting.  Such a thick wall.  And look at that fine surface sclupting.  

[Gen. et sp. indet.]

The mystery have been now solved. The tubes like the one from the photos 2-4 are spikes of Ctenostreon proboscideum. I suggested it in my first post, but only later got a confirmation from an expert.

[abyssunder]

It could be, I agree, considering that the Ctenostreon proboscideum valves were very large in the Callovian of Zalas (Zalas Quarry).

 

About the first picture, I think there could be serpulid/ sabellid worm tubes cemented together (calcitic/aragonitic tubes), in a trensverse section, similar to the ones below, in the comparative picture, from the Upper Cretaceous (Maastrichtian) of Belgium and Netherlands.

 

Fig. 12. C. would be close to my thinking.

excerpt from T. Koci et al. 2016. Sabellid and serpulid worm tubes (Polychaeta, Canalipalpata, Sabellida) from the historical stratotype of the Cenomanian (Late Cretaceous; Le Mans region, Sarthe, France). Annales de Paléontologie 103 (2017) 45–80.

Edited July 25, 2017 by abyssunder

[Gen. et sp. indet.]

Thanks. Either this or a gastropod