Abstract

Four species of Schizolepis including three new species from west Liaoning province and Inner-Mongolia have been described. As the seeds with wings were found in cones for the first time, their relationship to Pinaceae was closer than it had been thought. With the characters observed on fossil as well as evidence from palaeobotanical works and teratology, the authors have discussed the propinquity and possible evolutionary relationship with other families of Pinaceae as well as other groups of conifers and thought: 1) there was a series starting from Pseudovoltzia, through Tricanolepis and Schizolepis, leading into extant conifers; 2) the different parts of scale and bract have been undergoing a coalescence; 3) seed wings have undergone a process from non-existence, advent to fully development; and 4) more attention should be paid to the Lycopsida for the consideration of ancestral conifers.

中文摘要

本文描述了來自遼寧省和內蒙古的裂鱗果屬的 3 個新種(小翅裂鱗果、平列裂鱗果、三瓣裂鱗果)和 1 個老種(謬勒裂鱗果)。由於首次發現其毬果中的種子具翅，使之與松科的關係比原先所想的要近些。根據觀察到的化石性狀、古植物資料及畸形學資料，作者討論了其與松科中及松柏類中其它類群的親緣關係及可能的演化路線，認為 (1) 有一條從假伏脂松屬，經過三瓣裂果屬，裂鱗果屬，演化到現代松柏類的演化路線。(2) 種鱗、苞片及其各個組成部分一直在發生愈合。(3) 種翅經歷了從無到有，從小到大的發展過程。(4) 考慮松柏類祖先類群時也應注意石松類。 關鍵詞: 裂鱗果屬(Schizolepis)，假伏脂松屬(Pseudovolzia)，三瓣裂果屬(Triconolepis), 松柏類，石松類，遼寧省，內蒙古。

Keyword: China, Conifer, Inner-Mongolia, Liaoning province, Lycopsida, Pseudovoltzia, Schizolepis, Tricanolepis.