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Gen. et sp. indet.

bryozoans

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Gen. et sp. indet.

Two colonies found today in central Poland. Erratic boulders, so no data available other than this: Ordovician or Silurian, Baltica.

Is there an easy way to distinguish between various 'monticuliporid' taxa actually placed in different trepostome families?

IMAG7820_1.thumb.jpg.b6de042a7cd36853699fdd816106ff0e.jpg

IMAG7805_1.thumb.jpg.9743ec747e2dd6c8e7a8eb6bb7e6fc24.jpg

 

Smaller specimen:

IMAG7861_1.thumb.jpg.a994e1f1331c7c79d6f017016790f4a2.jpg

IMAG7859_1.thumb.jpg.26ed9fe57866d86776095d3d537456f0.jpg

 

 

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thelivingdead531

@Tidgy's Dad might know. What do you think, Adam? I feel like this may be your area of knowledge. :)

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Tidgy's Dad

It's an absolute nightmare of taxonomy and morphology. 

You really have to be an expert which i'm rather afraid I'm not. 

And without knowing the exact horizon it would become near impossible, I would say.

Sorry. :(

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piranha

These look like tabulate corals.  

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thelivingdead531
1 hour ago, Tidgy's Dad said:

It's an absolute nightmare of taxonomy and morphology. 

You really have to be an expert which i'm rather afraid I'm not. 

And without knowing the exact horizon it would become near impossible, I would say.

Sorry. :(

Sorry then! You were the first person to come to mind though. :)

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Wrangellian

@Spongy Joe has some knowledge of Bryo's too, doesn't he? except I haven't seen him around lately, maybe others have?

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ynot
1 hour ago, Wrangellian said:

@Spongy Joe has some knowledge of Bryo's too, doesn't he? except I haven't seen him around lately, maybe others have?

Has not been onsite since mid july.

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Gen. et sp. indet.

Thank you all for the answers.

Here are some magnifications of the bigger specimen...

 

IMAG7865a.thumb.jpg.a7573213b6b78aebcf8bf1d9777616a4.jpg

IMAG7866a.thumb.jpg.b7b43773c838d13f56a9d42eab9047b4.jpg

IMAG7867a.thumb.jpg.77af35a59789917ee4179df40393c402.jpg

 

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Gen. et sp. indet.
13 hours ago, piranha said:

These look like tabulate corals.  

Are you sure? :o

 

 

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Rockwood
14 hours ago, piranha said:

These look like tabulate corals.  

The third photo definitely looks like a tabulate.

I'm not sure the larger piece is preserved well enough to be identified.

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doushantuo

do you perchance mean something like this:

2f5666tyyy774ett77archime44e5tmedtr2m35pltwillist.jpg

 

possibly?("Ordovician erratic Bryozoa of Poland/1962")

about 5,5 Mb,and might contain obsolete taxonomy 

 

there are biometrical(stereometrical) criteria available for species discrimination,btw

(below,image from Jimenez-Sanchez/Geodiversitas,2010),should be in several libraries here

 

2f5666tyyy774ett77archime44e5tmedtr2m35pltwillist.jpg

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Gen. et sp. indet.
20 hours ago, doushantuo said:

 

Thanks! I've got all these papers now and will read them. Unfortunately, it seems clear now, without cut samples and much knowledge, I won't be able to ID the colonies. 

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Johannes

For the (on genera-level) comparable ordovician baltic province bryozoa I use "Bassler 1911 The early Paleozoic Bryozoa of the Baltic Provinces": old, but still very usable (and with very good and instructive pictures). Ways better than Kiepura 1962.

 

@ Rockwood: treptostomate bryozoa often look like "mini-tabulata" on the first view , but when you have a closer look (and a very good preparated or plane-polished surface) there are significant differences in microstructure.

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