ID requested: lower permian vertebrate fauna from Texas red beds & Waurika

[ziggycardon]

Hi! 

I recently acquired a few new additions to my permian collection, but there are a few pieces of which I am not a 100 % whether they are ID'd correctly, simply because I am not yet knowlegdeable about the material. 
So I thought it might be a good idea to post the ones I am doubtfull about here, as I know there are a lot of people more knowlegdeable than me who probably could ID them.  

The first item is a small claw listed as "juvenile dimetrodon limbatus" from the Red Beds, Archer County, Texas, USA
I was a bit doubtfull when they said "juvenile" dimetrodon claw, but I got it anyway because it's a very nice permian claw which was an okay price regardless the ID.

 

The second item is a caudal vertebra that was listed as "Edaphosaurus" (from the Archer City Formation, Red Beds, Archer County, Texas, USA) which came as a set along with a piece of sail spine which without doubt belongs to Edaphosaurus. 

 

The last items were sold as a collection of "Eryops megacephalus" fossils from the Wellington garbar complex, Waurika, Okhlahoma.
From left to right are a piece of skull plate, a toe bone, a piece of dermal armor and a tooth.

[Fossildude19]

@dinodigger

 

 

Waurika LINK.

[Bobby Rico]

Hi Ziggy

you might find this post interesting and useful. 

 

 

[gigantoraptor]

The claw doesn't seem to be curved enough to be Dimetrodon. 

 

Maybe this figure with the cross sections will help you out? I can't see the picture very well.

(A) Cotylorhynchus,
(B) Varanops

(C) Edaphosaurus

(D) Haptodus

(E) Dimetrodon.

 

 

I don't know if it's even possible to ID this claw down to species level. There isn't a formation given and multiple species of Dimetrodon lived together with a whole lot of other animals and other Dimetrodon species.

[Troodon]

Here is the paper on claws.  Compare them to yours.

Permian Claw.pdf

 

Your centurm might be one but without more of the neural process not sure you can assign it to a specific genus.

[ziggycardon]

2 hours ago, gigantoraptor said:

The claw doesn't seem to be curved enough to be Dimetrodon. 

 

Maybe this figure with the cross sections will help you out? I can't see the picture very well.

(A) Cotylorhynchus,
(B) Varanops

(C) Edaphosaurus

(D) Haptodus

(E) Dimetrodon.

 

 

I don't know if it's even possible to ID this claw down to species level. There isn't a formation given and multiple species of Dimetrodon lived together with a whole lot of other animals and other Dimetrodon species.

 

54 minutes ago, Troodon said:

Here is the paper on claws.  Compare them to yours.

Permian Claw.pdf

 

Your centurm might be one but without more of the neural process not sure you can assign it to a specific genus.

Thank you very much for the replies, this is really helpfull! 
It is indeed very hard, especially when I believe the base of the claw is missing. 
The claw is quite thin, so I think I can rule out Cotylorhynchus & Varanops.
I will go through the paper and do some further comparing with my specimen, although I think I have to agree with @Troodon and doubt I will be able to assign it to a specific genus.
But thank you very much for the help, I really appreciate it!