Cerion angustocostata Maynard and Clapp in Maynard, 1921
"115. S. angustocostata.
More robust, 1.05 by .55; frontal bar incomplete, low; costae 37, thin. low. one half as wide as interspaces; yellow-white. Fossil on Lower Fleming. 8. Plate 37. figs.7. 8." (Maynard and Clapp in Maynard, 1921b:141)