Service records of Newman H. Clanton and P.F. Clanton are filed under Miscellaneous Texas (there may be others). They are among those found on the list you want. However, the list shows they were in the Texas Militia. You probably need to send a copy of the card abstract to the National Archives to identify the record you want. I contacted the Textual Archives Services Division of the National Archives. That was almost ten years ago so I am not sure if the archives is still organized that way.