Pennsylvanian Trace Fossils from Naco Formation

[DPS Ammonite]

 

Please help ID these Pennsylvanian Naco Formation trace fossils from central Arizona.

 

Help Chris. @Arizona Chris

 

Are the 1 cm wide chevron tracts in photo 3 Cruziana from trilobites?

 

 

What are the 2.5 - 3 cm long teardrop shaped features in photos 1 and 2?

 

What are the 2.5 - 3 cm long teardrop shaped features in photos 1 and 2?

 

What are the elongated traces 3.5 to 4.5 cm long with length parallel marks in photo 4? From crustaceans?

Edited May 6, 2023 by DPS Ammonite

[Arizona Chris]

In the first image, the track like trails are Scolicia, we find them quite often in the Naco. most likely large gastropod trails.   I dont think the round lumps in the 2nd or third shots are trace fossils.  In the 4th image, we have seen clusters of these again in the Naco, I belive they are called Asterosoma.  

[DPS Ammonite]

9 minutes ago, Arizona Chris said:

In the first image, the track like trails are Scolicia, we find them quite often in the Naco. most likely large gastropod trails.   I dont think the round lumps in the 2nd or third shots are trace fossils.  In the 4th image, we have seen clusters of these again in the Naco, I belive they are called Asterosoma.  

Thanks Chris.