Fossil Sponges From Russia

[Evgeny Kotelevsky]

Just today I've found complete(!!!) Chaetetes radians It's big, round and heavy I'll show it

[Evgeny Kotelevsky]

Name: Pemmatites macroporus

Class: Demospongia

Age: C₃g

Location: Moscow, Russian Federation

Edited September 16, 2013 by Evgeny Kotelevsky

[Wrangellian]

That's a chaetitid? And C2 is part of the Carboniferous? (what part?)

[Evgeny Kotelevsky]

That's a chaetitid? And C2 is part of the Carboniferous? (what part?)

It is not chaetetid I will show it later

C₃ - Upper Pennsylvanian.

I've just edited my post

[Wrangellian]

OK. I'm not familiar with C1, C2 etc.. do you have a chart that shows the correlations with the International chart?

[Evgeny Kotelevsky]

OK. I'm not familiar with C1, C2 etc.. do you have a chart that shows the correlations with the International chart?

Here's the link - http://ammonit.ru/geochronos.htm

[Wrangellian]

That shows the International units which I am familiar with, but what are C1, C2, C3, etc?

[Evgeny Kotelevsky]

That shows the International units which I am familiar with, but what are C1, C2, C3, etc?

C1 - Mississippian

C2 - Lower and Middle Pennsylvanian

C3 - Upper Pennsylvanian

[Wrangellian]

Interesting..... I am not familiar with that system, I don't think it is used over here.

[Missourian]

More specifically, is it the following?....

C1 - Miss: Tournaisian-Viséan-Serpukhovian

C2 - Penn: Bashkirian-Moscovian

C3 - Penn: Kasimovian-Gzhelian

[Evgeny Kotelevsky]

Interesting..... I am not familiar with that system, I don't think it is used over here.

It's Russian geochronological chart. It is used by now

[Evgeny Kotelevsky]

More specifically, is it the following?....

C1 - Miss: Tournaisian-Viséan-Serpukhovian

C2 - Penn: Bashkirian-Moscovian

C3 - Penn: Kasimovian-Gzhelian

Exactly!

[Evgeny Kotelevsky]

Name: Chaetetes radians

Class: Demospongia

Age: C₂m

Location: Saratov, Russian Federation

Complete colony of Chaetetes radians

3D-image

You can see it's outer surface close-up on the upper right photo

[Evgeny Kotelevsky]

Name: Porosphaera globularis

Class: Calcarea

Age: K₂m

Location: Ozinki, Saratov region, Russian Federation

[Evgeny Kotelevsky]

Name: Lepidospongia sp.

Class: Hexactinellida

Age: K₂st

Location: Saratov, Russian Federation

This specimen is an example of sponge's vitality.

A big bowl-shaped sponge was broken by storm. A piece of it continued living by growing it's own roots. This process is described on scheme below.

[Auspex]

...This specimen is an example of sponge's vitality.

A big bowl-shaped sponge was broken by storm. A piece of it continued living by growing it's own roots. This process is described on scheme below.

What an interesting fossil! Thank you for interpreting it for us

[Evgeny Kotelevsky]

What an interesting fossil! Thank you for interpreting it for us

Thanks for your interest in sponges

[Evgeny Kotelevsky]

Name: undescribed

Class: Hexactinellida

Age: K₂st

Location: Saratov, Russian Federation

Undescribed sponge of a new undescribed genus of family Euretidae

[Auspex]

A new Genus! Congratulations

[Evgeny Kotelevsky]

A new Genus! Congratulations

Thanks!!! In my collection I have 6 undescribed sponges I'll make 3D-models of other 5 and show them too

[Evgeny Kotelevsky]

Name: Cameroptychium sp.

Class: Hexactinellida

Age: K₂st

Location: Saratov, Russian Federation

[Wrangellian]

Such a diverse variety there. I am in the Santonian too but so far only one taxon that I know of here. Are yours mostly Hexactinellids? I'm curious how you can tell which class they belong to - is there something about the shape or can you see the characteristic skeletal structure like in my specimen I showed you?

[Ridgehiker]

Interesting..... I am not familiar with that system, I don't think it is used over here.

It depends a lot on what age of rock is being studied. In the late Palaeozoic parts of Russia stretching across the Arctic down into the Rockies were a similar faunal province. A lot of the research was by Russian geologists. This was used by Canadian and American researchers. In contrast, the Late Paleozoic formations of the Eastern USA are unrelated although similar at the macro level.

However, by the Mesozoic continents had drifted, the oceans changed, etc. and different patterns emerged. Your region (BC) is a unique and special kettle of fish.

[Wrangellian]

Interesting as always... It's just that I have been looking at geo. timescales (incl. European etc) for years but I have never seen the Carb. divided quite like that.. certainly not in the modern ICS which is divided into Miss/Penn or Lower/Upper and those are divided further.

[Evgeny Kotelevsky]

Such a diverse variety there. I am in the Santonian too but so far only one taxon that I know of here. Are yours mostly Hexactinellids? I'm curious how you can tell which class they belong to - is there something about the shape or can you see the characteristic skeletal structure like in my specimen I showed you?

In our Santonian about 200 species can be found both classes, Hexactinellida and Demospongia. Our Lower Santonian is also called "sponge horizont". I use to consult prof. Pervushov, the world-famous specialist in Hexactinellida sponges, with my findings. He lives in Saratov, as I do, and once a week we discuss sponges, studying them, going for "sponge-hunt" together. Every visit I learn something new about sponges.

Hexactinellida differs from Demospongia by types of spicules and by spicule structure.

Please, upload your sponge! If my knowledge would be enough to tell you it's name - I'll tell you, if not - I will show your photo to prof. Pervushov next week