Xu Peng, Liu Le, Wang Deming
Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China.
School of Geoscience and Surveying Engineering, China University of Mining and Technology Beijing, Beijing 100083, China.
Biology (Basel). 2022 Oct 21;11(10):1544. doi: 10.3390/biology11101544.
South China displays Devonian strata with well-exposed outcrops and is regarded as a diversity hotspot of Late Devonian lycopsids. The heterosporous lycopsid has been studied for over ten years, with its general morphology, aerial stem anatomy, microsporangiate strobili, and growth architecture reported. Based on new specimens from Guangde City, Anhui Province, this study provides further knowledge about the megasporangiate strobili and megaspores of . Its slender megasporangiate strobili occur singly or in pairs and occasionally bifurcate in the middle-upper portion. Each megasporophyll consists of a flattened pedicel and an adaxially curved lamina. The lamina forms a downturned heel at the base. Each sessile megasporangium contains at least eight -type megaspores with a small gula. The other observed characteristics of in this study conform to those previously known and are compared to relative coeval taxa.
中国南方泥盆纪地层露头出露良好，被视为晚泥盆世石松类植物的多样性热点地区。对这种异型孢子石松类植物的研究已有十多年，其一般形态、气生茎解剖结构、小孢子叶球和生长结构均有报道。基于安徽省广德市的新标本，本研究进一步揭示了该植物大孢子叶球和大孢子的相关信息。其细长的大孢子叶球单生或成对出现，偶尔在中上部二叉分枝。每个大孢子叶由扁平的柄和向轴弯曲的叶片组成。叶片在基部形成向下弯曲的叶踵。每个无柄大孢子囊至少包含八个具小咽喉的某类型大孢子。本研究中观察到的该植物的其他特征与先前已知的特征相符，并与同期相关类群进行了比较。
