Three Unlabeled Trilobites to ID

[minnbuckeye]

Being stuck at home has given me the opportunity to rummage through my fossils. I started with my trilobites. Weeded out three containers of Isotelus partials to give to the local sand pit. But I found 3 unidentified trilobites tucked in with the Isotelus for some reason.. Any help at IDs is appreciated.  

 

1. Gerastos?? I think this was a gift to me many years ago.  

 

 

 

 2. Thaleops? Though I considered Illaenus or even Bumastus. The matrix looks like the Platteville, Ordovician 

 

 

 

 

3. I have such difficulty with "rollers"! Thaleops?  Matrix looks like the Galena, Ordovician that I frequent.  

 

 

[piranha]

8 hours ago, minnbuckeye said:

Being stuck at home has given me the opportunity to rummage through my fossils. I started with my trilobites. Weeded out three containers of Isotelus partials to give to the local sand pit. But I found 3 unidentified trilobites tucked in with the Isotelus for some reason.. Any help at IDs is appreciated.  

 

1. Gerastos?? I think this was a gift to me many years ago.

 

 2. Thaleops? Though I considered Illaenus or even Bumastus. The matrix looks like the Platteville, Ordovician

 

 

3. I have such difficulty with "rollers"! Thaleops?  Matrix looks like the Galena, Ordovician that I frequent.

 

 

1) Morocops sp.

2) Isotelus simplex

3) Thaleops sp.

[minnbuckeye]

2 hours ago, piranha said:

2) Isotelus simplex

 

2 hours ago, piranha said:

 

  

@piranha, Thanks for the IDs. I didn't even notice the partial eye until Isotelus was suggested as an ID. Good call!! One question.  

     1. Is Morocops similar to Gerastos? Info on Morocops is slim for me. If so, how do you differentiate them? 

    

[piranha]

3 hours ago, minnbuckeye said:

 Thanks for the IDs. I didn't even notice the partial eye until Isotelus was suggested as an ID. Good call!! One question.  

     1. Is Morocops similar to Gerastos? Info on Morocops is slim for me. If so, how do you differentiate them?    

 

Here is a side by side comparison. "Phacops" granulops, "P." lebesus and "Barrandeops" spp. were all subsequently reclassified as: Morocops

 

Chatterton, B.D.E., Fortey, R.A., Brett, K.D., Gibb, S.L, McKellar, R.C. 2006
Trilobites from the Upper Lower to Middle Devonian Timrhanrhart Formation, Jbel Gara et Zguilma, Southern Morocco. Palaeontographica Canadiana, 25:1-177  PDF LINK

 

Gibb, S.L., Chatterton, B.D.E. 2010

Gerastos (Order Proetida; Class Trilobita) from the Lower to Middle Devonian of the Southern Moroccan Anti-Atlas Region. Palaeontographica Canadiana, 30:1-89

[minnbuckeye]

I went went back to the barn today and played with my trilobites collection again. In among the specimens was one more unidentified trilobite. Can anyone ID this one before @piranha sees this????? The trilobite is from the Galena/Ordovician in NE Iowa. This should be the last one!!

[Coco]

Hi,

 

Did you forget the pic ?

 

Coco

[minnbuckeye]

@Coco, my wife always calls me forgetful. Does she really have a point? 

 

 

[piranha]

Image from: MidwestPaleo.com

[Coco]

@minnbuckeye Yes she does !

 

I think nobody is able to beat @piranha !

 

Coco