New fossil pinaceae from the early cretaceous of Mongolia
New fossil pinaceae from the early cretaceous of Mongolia
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DOI：
10.1139/cjb-2016-0042
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发表时间：
2016-09
期刊：
影响因子：
1.1
通讯作者：
Fabiany Herrera;A. Leslie;G. Shi;Patrick Knopf;N. Ichinnorov;Masamichi Takahashi;P. Crane;P. Herendeen
中科院分区：
文献类型：
--
作者：
Fabiany Herrera;A. Leslie;G. Shi;Patrick Knopf;N. Ichinnorov;Masamichi Takahashi;P. Crane;P. Herendeen
蒙古中部松散的早白垩世褐煤中含有丰富的保存完好的松叶和球果。这些化石包括两个种子球果，两者都有螺旋排列的苞片鳞片复合体，正面有两个带翅的种子。两个球果中较大的一个，被描述为Picea farjonii sp。 11月，呈圆柱形至椭圆形，末端长在粗壮的枝条上。苞片小，呈三齿状。芽上的叶基部呈螺旋状排列，附着的叶子呈线形且扁平。在所有保存下来的形态和解剖学特征中，法氏云杉与现存的云杉非常相似。较小的种子球果，被描述为 Pityostrobus stockeyae sp。 11 月，显示了现存松科几个属的特征。这个圆锥体是椭圆形的，末端有一个细长的枝条。苞片近端薄且呈三角形，但远端部分较厚，针状且落叶。云杉 (Picea farjonii) 和 Pityostrobus stocke...
Exceptionally well-preserved pinaceous leaves and seed cones are abundant in unconsolidated Early Cretaceous lignites in central Mongolia. These fossils include two seed cones, both of which have helically arranged bract–scale complexes with two winged seeds on the adaxial surface. The larger of the two seed cones, described as Picea farjonii sp. nov., is cylindrical to ellipsoidal, and was borne terminally on a stout shoot. The bract is small and tridentate. Leaf bases on the shoots are helically arranged, and attached leaves are linear and flattened. In all of the morphological and anatomical features that are preserved, P. farjonii is very similar to extant Picea. The smaller seed cone, described as Pityostrobus stockeyae sp. nov., shows features of several genera of extant Pinaceae. This cone is ellipsoidal and was borne terminally on a long, slender shoot. The bract is thin and triangular proximally, but the distal portion is thicker, needle-like, and deciduous. Picea farjonii and Pityostrobus stocke...