辽宁本溪中三叠统林家瓣轮叶(新种)  

LOBATANNULARIA LINJIAENSIS SP. NOV. FROM THE MIDDLE TRIASSIC OF BENXI, LIAONING

作　　者：徐亦知 岳宁 刘石 张宜[1,2] 郑少林 王永栋[4] 霍歆然[1] XU Yi-zhi;YUE Ning;LIU Shi;ZHANG Yi;ZHENG Shao-lin;WANG Yong-dong;HUO Xin-ran(College of Paleontology,Shenyang Normal University,Shenyang 110034,China;Key Laboratory for Evolution of Past Life in Northeast Asia,Ministry of Natural Resources,Shenyang 110034,China;Shenyang Center of Geological Survey,China Geological Survey,Shenyang 110034,China;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,Nanjing 210008,China)

机构地区：[1]沈阳师范大学古生物学院,沈阳110034 [2]自然资源部东北亚古生物演化重点实验室,沈阳110034 [3]中国地质调查局沈阳地调中心,沈阳110034 [4]现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所及生物演化与环境卓越创新中心,南京210008

出　　处：《古生物学报》2020年第3期329-344,共16页Acta Palaeontologica Sinica

基　　金：国家自然科学基金项目(31470324);中国科学院战略性先导科技专项(B类)(XDB18000000,XDB26000000);沈阳师范大学大学生创新创业训练计划项目“中国中三叠统瓣轮叶属新种的发现及古气候和古环境意义”(201-515001)联合资助。

摘　　要：在对中国东北辽宁本溪中三叠统林家组的化石研究中,发现了木贼目瓣轮叶属一个新种——林家瓣轮叶(Lobatannularia linjiaensis sp.nov.)。该种叶轮小,明显分成两瓣,每瓣叶数约10–12枚。叶线形至倒披针形,叶长差别大,叶联合长度占叶长约1/3–3/4。自1927年Kawasaki建立瓣轮叶属以来,该属已至少发现了33种,其中大部分报道于二叠纪,少数见于三叠纪。瓣轮叶属作为晚古生代华夏植物群孑遗分子之一,当前该属新种的发现不仅丰富了瓣轮叶属的分类多样性,而且拓展了对二叠纪-三叠纪之交生物大灭绝及之后复苏过程中瓣轮叶属演化趋势的认识。Lobatannularia linjiaensis sp.nov.belonging to the order Equisetales has been described from the Middle Triassic Linjia Formation of Benxi in Liaoning,Northeast China.The new species is characterized by small leaf-whorls,each leaf-whorl forming two marked lobes,generally composed of 10–12 leaves;leaves linear to oblanceolate,with different sizes in length,united for 1/3 to 3/4 of their length.Since Kawasaki erected the genus Lobatannularia in 1927,at least 33 species have been described on the basis of the morphology of the megafossils.Most of them are collected from the Permian,seldom found in Triassic.As a relict Cathaysian element,the new species not only enlarges the knowledge in taxonomy of Lobatannularia,but also provides an opportunity to understand the evolution of Lobatannularia in the mass extinction through the Permian–Triassic transition and its subsequent recovery.

关 键 词：林家瓣轮叶(新种) 中三叠统 辽宁 华夏植物群 孑遗分子 演化 

分 类 号：Q915.8[天文地球—古生物学与地层学]