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Tidgy's Dad

Wins from an auction hosted by my friend @Kasia

These bits are in a medium grey limestone found at Raback, near Kinnekulle, Vastegotland, Sweden, so are probably from the Upper Cambrian part of the Alum Shale Formation. 

Maybe Peltura scaraboides? Or is there not enough left to get close to an id? Max 5 mm wide and 4 mm long. 

1.thumb.jpg.960711787202dbdcdbb4b674c1db8199.jpg 

1a.thumb.jpg.77a08f190bd99310f9a7dc85925d60f8.jpg

All specimens are on the same rock.

2a.thumb.jpg.508ca4f03123f5a8ca3ddd9189118f98.jpg

The scale's in mm and is partially obscuring a bit seen better below :

2.thumb.jpg.636fa38afff5876710d6728cfd1b81d0.jpg

2b.thumb.jpg.352f126b79ddb09851b429411a900801.jpg

2d.thumb.jpg.963038daade0b9e8d146e9884c605dd4.jpg

3.thumb.jpg.e4511d512516d9c0dcc9a49e731e120d.jpg

3a.thumb.jpg.1c49b2cb22039582d2c8cdc3993b32b4.jpg

4.thumb.jpg.c4a44f709976300a2392f9d2796c4aeb.jpg

5.thumb.jpg.e48adee6401dc3e13167f735e8c71d63.jpg

6.thumb.jpg.e5718119f001d89a2518b55963ed4abb.jpg

6a.thumb.jpg.2b2d4bf80e2485de36ebd2418243cffc.jpg

6b.thumb.jpg.34359c2e471e5a331160e2dabc53ea2d.jpg

Not really expecting too much from these tiny fragments, but any help or blind guesswork very much appreciated.

@piranha @Johannes @Dromiopsis

But anyone else more than welcome to comment too

Thank you. 

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piranha

Peltura scarabaeoides looks like a good match.  Henningsmoen 1957 described a couple of subspecies: P. scarabaeoides scarabaeoides and P. scarabaeoides westergårdi

 

Henningsmoen, G. 1957. The Trilobite Family Olenidae with descriptions of Norwegian material and remarks on the olenid and Tremadocian Series.

Skrifter utgitt av Det Norske Videnskaps-Akademi i Oslo. I. Matematisk-Naturvidenskapellg Klasse, 1957(1):1-303  PDF LINK

 

image.thumb.png.ab38ecbf53cced1bbfa30142af6935a6.png

 

figures from:

 

Bird, C. & Clarkson, E.N.K. 2003

Observations on the Ontogeny of Peltura scarabaeoides westergaardi Henningsmoen, 1957.

Geologiska Föreningens i Stockholm Förhandlingar, 125(4):177-190

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Tidgy's Dad
3 hours ago, piranha said:

Peltura scarabaeoides looks like a good match.  Henningsmoen 1957 described a couple of subspecies: P. scarabaeoides scarabaeoides and P. scarabaeoides westergårdi

Thank you very much, Scott.  

Tis nice to be (probably) right about a trilo id every now and again. :)

I think I'll pass on the id to subspecies level for now, though! 

Thanks for the paper, decent long read on the Olenids. 

And those images look pretty close, the free cheeks also really match my specimens.

 

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Johannes

Regarding the picture quality, I can't see clear details to assign a species name, so I would name them only on genus level: Peltura sp.

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