Middle to Late Ordovician (Darriwilian-Sandbian) Conodonts from the Dawangou Section, Kalpin Area of the Tarim Basin, Northwestern China Author Zhen, Yong Yi text Records of the Australian Museum 2011 2011-11-30 63 3 203 266 http://dx.doi.org/10.3853/j.0067-1975.63.2011.1586 journal article 10.3853/j.0067-1975.63.2011.1586 2201-4349 5239657 Drepanodus Pander, 1856 Type species . Drepanodus arcuatus Pander, 1856 .