Upper Cambrian mortality plate

[terapoza]

Hello.I found in my collection another very problematic piece. It was found in Tømte, Ringsaker district in Norway. This upper Cambrian black bituminous shale formation contains some anthraconite concretions and layers. This anthraconite or black bituminous limestone also called stinkstone because of characteristic smell when hammered is full of cephalons and pygidiums. Finally after few hours of research I choose two zones of Olenids. First is Olenus & Agnostus obesus zone, subzone Wahl ( Olenus wahlenbergi). Second choice is Agnostus pisiformis zone with Olenus alpha. In my opinion specimen below coming from Olenus wahlenbergi and Agnostus obesus zone. 

Any hints and other ideas will be very helpful.

 

[JohnBrewer]

Lovely plate.

[Arizona Chris]

I want to find one like that!

[Sagebrush Steve]

4 hours ago, terapoza said:

Hello.I found in my collection another very problematic piece. It was found in Tømte, Ringsaker district in Norway. This upper Cambrian black bituminous shale formation contains some anthraconite concretions and layers. This anthraconite or black bituminous limestone also called stinkstone because of characteristic smell when hammered is full of cephalons and pygidiums. Finally after few hours of research I choose two zones of Olenids. First is Olenus & Agnostus obesus zone, subzone Wahl ( Olenus wahlenbergi). Second choice is Agnostus pisiformis zone with Olenus alpha. In my opinion specimen below coming from Olenus wahlenbergi and Agnostus obesus zone. 

Any hints and other ideas will be very helpful.

 

 

I’m not sure but here is a paper that might help: Olenelloidea.pdf.  (Sorry I had to reduce the file size to get it under the file size limit so the color photo looks a little weird.) I have contacted Dr. Lieberman about Olenellids by email in the past and he has been helpful answering my questions.  You might try reaching out to him.

 

[Douvilleiceras]

11 minutes ago, Sagebrush Steve said:

 

I’m not sure but here is a paper that might help: Olenelloidea.pdf.  (Sorry I had to reduce the file size to get it under the file size limit so the color photo looks a little weird.) I have contacted Dr. Lieberman about Olenellids by email in the past and he has been helpful answering my questions.  You might try reaching out to him.

 

Interesting article, but the trilobite in question is an Olenid (Order Ptychopariida) rather than an Olenellid (Order Redlichiida).

[piranha]

Here is the classic monograph on the Olenidae:

 

 

Henningsmoen, G. (1957)
The trilobite family Olenidae: with description of Norwegian material and remarks on the olenid and Tremadocian series.
Skrifter Utgitt av Det Norske Videnskaps-Akademi i Oslo. Matematisk-naturvidenskapellg klasse, 1957(1):1-303  PDF LINK

[Sagebrush Steve]

44 minutes ago, Douvilleiceras said:

Interesting article, but the trilobite in question is an Olenid (Order Ptychopariida) rather than an Olenellid (Order Redlichiida).

Well that explains why they didn’t look familiar 

And I did say it “might” help, I didn’t say it “would” help 

[terapoza]

thanks for replies. I am sure that the links to articles about  will be helpful.