Equisetum cf. pratense (Equisetaceae) from the Miocene of Yunnan in Southwestern China and Its Paleoecological Implications
Equisetum cf. pratense (Equisetaceae) from the Miocene of Yunnan in Southwestern China and Its Paleoecological Implications
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DOI：
10.1086/510411
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发表时间：
2007-03
影响因子：
2.3
通讯作者：
Yu‐Ling Zhang;D. Ferguson;A. Ablaev;Yu-Fei Wang;Cheng-Sen Li;Lei Xie
中科院分区：
文献类型：
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作者：
Yu‐Ling Zhang;D. Ferguson;A. Ablaev;Yu-Fei Wang;Cheng-Sen Li;Lei Xie
木贼的根状茎具块茎cf。Pratense Ehrhart系首次记述于云南L河晚中新世，位于中国西南部。根状茎由明显的节间和节间组成。这些节结有一到四束块茎(每束两到四个块茎)。块茎椭圆形、圆形、卵形或纺锤形，最上部为短尖。E.cf.Pratense表明栖息地潮湿，根茎和块茎的存在意味着埋葬发生在晚秋或冬季，假设化石和它最接近的现存亲戚具有相似的气候耐受性和物候。这些发现，结合嗜热属青冈属、红锥属、枫香属和喜湿元素Alnus、Taxodioxylon的存在，反映了L河地区中新世温暖潮湿的亚热带气候。
Rhizomes with tubers of Equisetum cf. pratense Ehrhart are described for the first time from the late Miocene of Lühe, Yunnan Province, southwestern China. The rhizomes consist of distinct nodes and internodes. The nodes bear one to four bunches of tubers (two to four tubers per bunch). The tubers are elliptical, rounded, ovate, or spindle shaped, and the most distal is mucronate. The occurrence of E. cf. pratense would indicate a wet habitat, and the presence of rhizomes with tubers implies that burial occurred during the late fall or winter, assuming that the fossil and its nearest living relative have similar climatic tolerances and phenology. These finds, combined with the presence of thermophilous genera Cyclobalanopsis, Castanopsis, and Liquidambar and hygrophilous elements Alnus and Taxodioxylon, indicate a warm and humid subtropical climate at Lühe in the Miocene.