Plant Paleontology-Lotus Leaf Fossils Age: Late Triassic Origin: Tiaojishan Formation, Beipiao City, Liaoning Province, China Category: Ferns Name: Hausmannia shebudaiensis describe：shebudaiensis is the name of a village in Chaoyang, and Hausmannia is the transliteration of a lotus fern. Hausmannia is the most representative fossil of the family Diphyllidae. It flourished in the Mesozoic Era, with about 40 species around the world. Dipteridaceae is a tropical true fern, with only one genus (Dipteris) currently living, and its distribution is limited to India-Malaysia and South China. However, during the Mesozoic Era, plants of this family were widely distributed around the world (up to more than 60 species in 6 genera) and were important indicator plants for global climate warming and plant geography at that time. They are so rare that they belong in botanical museum-quality collections.