The Turritella Inezana from the Vanqueros Formation in the Cajon Pass, California

Turritella inezana Conrad (1857) is a tall, high-spiraled gastropod common in Miocene marine rocks of California and the focus of this study. Specimens of Turritella inezana have been identified from exposures of the Vaqueros Formation in the Cajon Pass (Woodring, 1942). The purpose of this project is to compare (i.e. measure and evaluate characteristics of the shell) specimens from Cajon Pass with subspecies of Turritella inezana from other localities of the Vaqueros formation in southern California. Specimens of Turritella inezana from Cajon Pass have not been compared with any specimen or subspecies including Turritella inezana santana Loel and Corey(1932), Turritella inezana sespensis Loel and Corey(1932) and Turritella inezana sespensis Loel and Corey(1932)