河南固始早石炭世杨山组植物群

系统描述了扬山组植物18属25种,其中以石松类及种子蕨和真蕨纲为主,仅少数属楔叶纲;石松类中发现不少叶座较小,叶痕相对较大的鳞木类植物,颇似华夏植物群中的鳞木类;首次报道了我国发现的古芦木孢囊穗.据对植物群综合分析,杨山组的时代为早石炭世中晚期.

FOSSIL PLANTS FROM YANGSHAN FORMATION (EARLY CARBONIFEROUS) IN GUSHI, HENAN

The material described in this paper was collected from Mt. Yangshan in Gushi district of southeastern Henan, with the fossil plants identified as Lepidodendron aff. aolungpylukense Sze, Lepidodendron cf. worthenii Lesquereux, Lepidodendron cf. shanyangense Wu et He, Lepidodendron dabieshClnsnse sp. nov., Lepidodendrongushiense sp. nov., Lepidodendron sp., Cathaysiodendron sp., Bothrodendron yangshanense sp. nov., Bothrodendron flabellatum sp. nov., Stigmaria ficoides Brongniart, Knorria sp., Lepidostrobophyllum sp., Archaeocalamites scrobiculatus Seward, Pothocites sp., Sphenophyllum sp. (cf. Sph. tenerrimum Ett.), Triphyllopteris gushiensis sp. nov., Triphyllopteris sp., Adiantites cf. gothanii (Sze), Aneimites sp., Cardiopteridium spetzbergense Nath., Cardiopteridium podozamioides (Sze), Rhodeopteridium hsianghsiangense (Sze), Sphenopteris cf. gracilis Brongn., Eusphenopteris cf. scribanii Amerom, Neuropteris sp. and Telangium sp. These 25 species are discriminated in the present paper, including 5 known species, 6 new species, 5 species provisionally compared with other known forms and 9 specifically indeterminable species.