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| PubMed | |
2. �й����ʴ�ѧ(�人) ��������뻷�����ʹ����ص�ʵ����, �人 430074
ͨ�����½�������ذ���ӵ�����٪�����²�³�������ӣ�Ginkgo obrutschewii Seward��ģʽ���ؼ�����������Ҷ��ʯ��Ƥ������о���������ΪӦ�Բ������ģʽ���صĻ�ʯ������Ϊ�϶�������Ҫ���������ݡ�����G. obrutschewii���ⲿ��̬��Ҷ��Ƥ������ܾ���һЩ�������������ۺ϶��ԣ�����Ҷ��Ƥ������Ҫ������ӦΪ����Ƥ����������ͨ��Ϊ������ʽ�����±�Ƥϸ�����ձ鷢��ǿ�Ȳ�ͬ�Ľ��ʻ���״��ͻ�����״ͻ�𣬴��ܱ���ֱ���䣻����������ʽ������ϸ�����촦��״�Ӻ�ǿ�ң�����ϸ��ͨ��ǿ�ҽ��ʻ������泣������״���ſ�״���ʻ��Ӻ�Ŀǰ�Ը���Ҷ��ʯ�IJɼ������Ƥ������о��в���֣�����о��д���һ�����롣������������˹ѧ�߹��ڱ��ֵIJ����½�����������ҶƬ��ʯ������Ա���Ҷ��Ƥ���������IJ���ȣ���ֵ����ȶ��
2. State key laboratory of biological geology and environmental geology, China University of Geosciences(Wuhan), Wuhan 430074, China
Through the study of the leaf cuticles of Ginkgo obrutschewii Seward in the Middle Jurassic strata of Baiyanghe where the holotype fossil was yielded, and its neighboring areas in the Junggar Basin, Xinjiang, China, the author suggests that the specimens from the Baiyanghe, the holotype fossil locality, are the base for recognizing the leaf cuticular characters of the taxon. Despite of some variations in its leaf shape and cuticular characters, integrating all the available information, the general features of the leaf cuticular characters of this taxon have been recognized as follows:the cuticles basically hypostomatic, ordinary epidermal cells usually cutinized and bearing less prominent cuticular dome and gentle smaller papillae in periclinal walls, and the anticlinal walls usually straight or uneven less sinuous. Stomata haplocheilic, the guard cells usually cutinized in lip-form surrounding the stomatal aperture, and subsidiary cells usually cutinized with lumps. However, the collecting and studying work of the holotype and topetype fossils of this taxon are not enough, further study on the leaf cuticular features of Ginkgo obrutschewii is still needed. In addition, further discussions are needed on the rationality of the identification of this taxon from the Fuhai of northern Xinjiang reported by Nosova et al. (2011).
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[2] Seward A C. Jurassic plants from Chinese Dzungaria, collected by Prof. Obrutschew[J]. Mémoires du Comité Géologique, St.-Pétersbourg,1911,75:1-61(in Russian and English).
[3] �½�������ʵ�����. ������ʱ���(����ӷ�, 1:20��).����:���ʳ�����,1983:1-40. Geological Survey of Xinjiang. Regional geological report (Baiyanghe area, 1:200000 in scale). Beijing:Geological Publishing House,1983:1-40.
[4] �½����ʿ����. �½�ά����������������־. ����:���ʳ�����,1993:1-841. Bureau of Geology and Mineral Resources of Xinjiang. Regional geology of Xinjiang Uygul Autonomous Region. Beijing:Geological Publishing House, 1993:1-841.
[5] Sun G, Miao Y Y, Mosbrugger V, et al. The Upper Triassic to Middle Jurassic strata and floras of the Junggar Basin, Xinjiang, Northwest China[J].Palaeobiodiversity and Palaeoenvironments,2010,90:203-214.
[6] ������. �½������������٪������ɽҤ��ֲ�ﻯʯ:˶ʿѧλ����[D]. �Ͼ�:�й���ѧԺ�Ͼ����ʹ������о���,2003. MIAO Yu-yan. Middle Jurassic plants from Xishanyao Formation of Baiyang River area of Emin, Xinjiang:master's degree thesis[D]. Nanjing:Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, 2003.
[7] ������. �½�������ذ������٪����ֲ�ﻯʯ�²���[J]. ������ѧ��,2005,44(4):517-534. MIAO Yu-yan. New material of Middle Jurassic plants from Baiyang River of Northwestern Junggar Basin, China[J].Acta Palaeontologica Sinica,2005,44(4):517-534.
[8] ������. �½��������������٪����������ʹĿ���ֲ��:��ʿѧλ����[D]. ����:���ִ�ѧ,2006. MIAO Yu-yan. Ginkgoales and Czekanowskiales from the Middle Jurassic in western Junggar Basin of Xinjiang, China:doctor's degree thesis[D]. Changchun:Jilin University, 2006.
[9] Nosova N, Zhang J W, Li C S. Revision of Ginkgoites obrutschewii (Seward) Seward (Ginkgoales) and the new material from the Jurassic of Northwestern China[J].Review of Palaeobotany and Palynology,2010,166:286-294.
[10] ��־��. ������ֲ��ϵͳ������������ݻ�����[J]. ����ֲ���о�,2003,25(4):377-396. ZHOU Zhi-yan. Mesozoic Ginkgoaleans:phylogeny, classification and evolutionary trends[J]. Acta Botanica Yunnanica, 2003, 25(4):377-396.