Shellfish fossil?

[JD1969]

Found this one in northern AZ. Couldn't find anything that resembles this online. Anyone have an idea?

[Fossildude19]

@DPS Ammonite

[DPS Ammonite]

It sort of looks like two stacked productid brachiopods. 
 

A better locality and knowledge of the rock layer that they came from will help. 
 

See county geological maps of Arizona at top of this post:

http://www.thefossilforum.com/index.php?/topic/86586-arizona-geological-maps/

 

My best guess is that they are Peniculauris bassi  brachiopods from the Permian Kaibab Formation. 
 

 

Edited July 16, 2022 by DPS Ammonite

[JD1969]

On 7/15/2022 at 7:12 PM, DPS Ammonite said:

It sort of looks like two stacked productid brachiopods. 
 

A better locality and knowledge of the rock layer that they came from will help. 
 

See county geological maps of Arizona at top of this post:

http://www.thefossilforum.com/index.php?/topic/86586-arizona-geological-maps/

 

My best guess is that they are Peniculauris bassi  brachiopods from the Permian Kaibab Formation. 
 

 

This also came from northern Arizona south of Joesph City Arizona and south of the little Colorado river. Was on the surface.

Edited Friday at 03:25 PM by JD1969

[DPS Ammonite]

5 hours ago, JD1969 said:

This also came from northern Arizona south of Joesph City Arizona and south of the little Colorado river. Was on the surface.

Kaibab Fm likely. My statement below still stands:

 

My best guess is that they are Peniculauris bassi  brachiopods from the Permian Kaibab Formation.

[DPS Ammonite]

On 4/19/2024 at 8:25 AM, JD1969 said:

This also came from northern Arizona south of Joesph City Arizona and south of the little Colorado river. Was on the surface.

Please correct name of Arizona city.