中国东北晚白垩世酢酱草属(酢酱草科)一新种:嘉荫酢酱草(英文)

Oxalis jiayinensis, a new species of the Late Cretaceous from Heilongjiang, NE China

本文描述了发现于中国黑龙江省嘉荫县晚白垩世（土仑期至赛诺期）的酢酱草科酢酱草属新种ＯｘａｌｉｓｊｉａｙｉｎｅｎｓｉｓＦｅｎｇ，Ｌｉｕ，ＳｏｎｇｅｔＭａ；炭化种子长约１ｍｍ，宽不足１ｍｍ；新月形，两端钝；表面具９～１０条横脊；种皮石细胞等轴、细胞壁明显加厚。

Oxalis jiayinensis, sp. nov., is described from the Late Cretaceous (Turonian Senonian) in Jiayin County, Heilongjiang Province, northeastern China. The seed is about 1 mm long, less than 1 mm in diameter, crescentic with obtuse apices and 9～10 transverse ribs. The seed wall is composed of equiaxial, strongly thickened sclereids. The fossil represents the oldest occurrence of the family Oxalidaceae in the world.