A marattialean fern,Scolecopteris libera n. sp., from the Asselian (Permian) of Inner Mongolia,China |
| |
| Institution: | 1. Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, China;2. University of Science and Technology of China, 96 Jinzhai Road, Hefei 230026, China;3. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, 39 East Beijing Road, Nanjing 210008, China;4. University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China;5. Centre of Palaeobiodiversity, West Bohemian Museum in Plzeň, Kopeckého Sady 2, 30100 Plzeň 3, Czech Republic;6. Department of Palaeobiology and Palaeoecology, Institute of Geology, Academy of Sciences of the Czech Republic v.v.i., Rozvojová 269, 16500 Prague 6, Czech Republic |
| |
| Abstract: | Scolecopteris libera n. sp. is established on partial three-dimensionally preserved materials containing both sterile and fertile fronds collected from the volcanic tuff at the top of the Taiyuan Formation at the Wuda Coalfield, Inner Mongolia, China. It is characterized by tripinnate fronds with rachises over 200 mm in diameter; and long lanceolate or falciform pinnules with thick veins. Pinnules are of the pecopterid-type, with those at the base of the ultimate pinnae usually divided into small lobes. Eight to twelve circular synangia are arranged in two rows along the midvein. Synangia are borne on a short pedicel attached to the middle of lateral veins. A synangium is composed of 7–10 fusiform exannulate sporangia with pointed apices. The sporangia are free among each other beyond the base of synangia. In situ microspores of the Cyclogranisporites leopoldii type differ from all other in situ Paleozoic marattialean spores. |
| |
| Keywords: | Marattiales Wuda Permian Micro-CT |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
