Baiera
Baiera is a genus of prehistoric gymnosperms in the order Ginkgoales. It is one of the oldest fossil foliage types of Ginkgoales, and is related to the genera "Ginkgo" and "Ginkgoites". Fossils of "Baiera" are found worldwide, and have been known from the Permian to the Cretaceous. Description. "Baiera" species are characterized by fan-shaped leaves, are deeply lobed into four segments, deeply incised into slender segments, and are distinguished from "Sphenobaiera" by a petiole. "B. africana" is characterized by its symmetrical and triangular leaves. Classification. Karl Friedrich Wilhelm Braun first introduced the name "Baiera" in 1843 to refer  to fossils in Germany that he interpreted as ginkgophytes. In 1936, Carl Rudolf Florin used "Baiera" to refer to leaves with a distinct stalk or petiole and with a semicircular or triangular shape. Placement of "Baiera". Gerd Dietl and Günter Schweigert (2011) place "Baiera" in the family Ginkgoaceae, while a 2015 classification by Andriy Novikoff and Beata Barabasz-Krasny places it in the Karkeniaceae.