Bob: This isn't an unknown type.  
It reflects the variation in the Calf Creek Series, Bell-Calf Creek-Early Barbed (which this looks like)...
or what some are calling Early Split-Stemmed.  Definitely Early Archaic, and unrelated to Pedernales.

Tom Hester

Thanks Tom, for the definitive answer from the definitive expert.
Dr. Hester is the co-author of "A Field Guide To Stone Artifacts of Texas Indians", now in it's 3rd
edition. (ISBN#0-87719-222-7)