An early infructescence Hyrcantha decussata (comb. nov.) from the Yixian Formation in northeastern China

作者：Dilcher David L^*; Sun Ge; Ji Qiang; Li Hongqi

来源：Proceedings of the National Academy of Sciences of the United States of America, 2007, 104(22): 9370-9374.

DOI：10.1073/pnas.0703497104

• basal angiosperms
• first flower
• flower evolution
• Lower Cretaceous

The continuing study of early angiosperms from the Yixian Formation (approximate to 125 Ma)of northeastern China has yielded a second early angiosperm genus. This report is a detailed account of this early flowering plant and recognizes earlier reports of similar fossils from Russia and China. Entire plants, including roots, stems, and branches terminating in fruits are presented and reconstructed. Evidence for a possible aquatic nature of this plant is presented. The relationship of Hyrcantha ("Sinocarpus") to the eudicots is discussed. The presence of this second early angiosperm genus, now known as a whole plant, is important in the discussion of its systematics and the ecology of the earliest angiosperms.

• 出版日期2007-5-29
• 单位中国科学院; 吉林大学