Fossil Shark Vertebra

This string of shark vertebra is as found in the natural chalk matrix.  I am not sure on the species, but appear similar to squalicorax shark vertebra we have found (with associated teeth).  The matrix measures ~13.5 inches by 3.5 inches.  There are 20 vertebra present (two are not laying flat).  Most vertebra measure approximately 1 inch diameter.  This fossil is from the Cretaceous age Niobrara Chalk formation of Kansas.  Email with any questions.