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基于内蒙古乌达下二叠统太原组火山凝灰岩中保存的标本对窄楔叶Sphenophyllum angustifolium(Germar)Goeppert的形态特征和生态习性进行探讨。标本异叶性明显,不同等级的茎上保存钩状线形叶、二裂叶、三裂叶和四裂叶。孢子叶穗着生于分枝顶端,每轮大约12片孢子叶,每片孢子叶近轴面上直接着生1个孢子囊,未发现孢囊柄的结构。本文对该植物的气生部分进行初步复原。根据本文材料以及已报道的楔叶属化石材料的形态学、解剖学特征和埋藏学的分析,认为该属植物可能是一种可以直立生长的草本植物,生活在三角洲平原、泛滥盆地或岸后湖泊、成煤沼泽及其边缘,适应轻度干旱至淹水环境。根据S.angustifolium(Germar)Goeppert深裂的叶型和表皮细胞特征,推测其可能生活在较长期淹水环境,属于湿性中生植物至湿性植物。
The morphological characteristics and ecological habits of Sphenophyllum angustifolium (Germar) Goeppert were studied based on the specimens preserved in volcanic tuff of the Lower Permian Taiyuan Formation, Wuda, Inner Mongolia. Specimens of different leaves obvious, different grades of stems stored on the hook-shaped linear leaves, two cracked leaves, three cracked leaves and four cracked leaves. Spore leaf spike was born in the top of the branch, each round of about 12 spore leaves, each spore leaf apical surface directly with a sporangia, found no cystic handle structure. In this paper, the plant’s aerial parts of the initial restoration. Based on the materials in this paper and the reported morphological, anatomical and burial characteristics of the genus Fusiform, the genus of this genus is considered to be an upright herbaceous plant that lives in delta plain, flooding basin or shore Lakes, coal briquette and its edges, to adapt to mild drought to flooding environment. According to the characteristics of leaf and epidermal cells of the deep-cleaved S. angustifolium (Germar) Goeppert, it is speculated that it may live in a longer-term flooding environment and belongs to the wet mesophyte to the wet plant.