North Texas shoe shaped bivalve

[Creek - Don]

I found these shoe shaped bivalves on highway roadcut near Justin, Tx.  I think I've seen these before, but forgot the name though.  Can anybody put a name to these bivalves?   They were found on limestore layer above the grey clay layer.  Fort Worth Limestone and Duck Creek Formation undivided.  They measure around  6 1/2 inches by 3 1/2 inches/15.24cm x 8.89 cm. 

Edited August 14, 2022 by Creek - Don

[JamieLynn]

I've heard them actually called Slipper Clams.  Psilomya is my best guess

[Creek - Don]

2 minutes ago, JamieLynn said:

I've heard them actually called Slipper Clams.  Psilomya jurafacies

Thank you!  You are right on.   I also found tons of nautiloid at the same spot.  

[Creek - Don]

My mistake.   These were found  highway 170 near Fort Worth Alliance Airport.   PawPaw Formation, Weno Limestone, and Denton Clay undivided.  

[DPS Ammonite]

Here is a good reference for similar Texas Cretaceous clams. Please, someone with access please let us see appropriate text and photos:

 

Scott, R., & Claggett, B. (2018). Albian infaunal Pholadomyida (Cretaceous Bivalvia), Comanchean Carbonate Shelf, Texas. Journal of Paleontology,92(4), 611-633. doi:10.1017/jpa.2017.139

 

https://www.researchgate.net/publication/324568535_Albian_infaunal_Pholadomyida_Cretaceous_Bivalvia_Comanchean_Carbonate_Shelf_Texas

 

 

Edited August 17, 2022 by DPS Ammonite