Wordian Stage

The first appearance of Jinogondolella aserrata evolved from Jinogondolella nankingensis is defined as the base of the Wordian Stage which is just below the top of the Getaway Limestone Member of the Cherry Canyon Formation in Guadalupe Pass, at 7.6 m above the base of the outcrop section (U.S. Highway 62/180), with the base at 31.8658o N, 104.8328o W in USA.