GONG, ZHIJUN, YANLING LI, DITMAR METZELTIN, and HORST LANGE-BERTALOT. 2013. “New Species of <em>Cymbella</em> and <em>Placoneis</Em> (Bacillariophyta) from Late Pleistocene Fossil, China”. Phytotaxa 150 (1):29–40. https://doi.org/10.11646/phytotaxa.150.1.2.