Tingia unita sp. nov. (Noeggerathiales) with strobilus from the Lower Permian of Wuda, Inner Mongolia, China

Tingia unita sp. nov. (Noeggerathiales) with strobilus from the Lower Permian of Wuda, Inner Mongolia, China
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廷贾·尤尼塔 sp.

DOI:
10.1007/s11434-006-2162-5
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发表时间:
2006-11
期刊:
科学通报(英文版)
影响因子:
--
通讯作者:
王军
王军
中科院分区:
其他
文献类型:
--
作者:
王军

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nov.都是从一个共同的茎发芽,从而提高了我们对华夏植物群的这个神秘的分类单元的整个植物形态的理解。孢子叶球圆柱形,直径1.7-2.5 cm,长20 cm以上,基柄宽7-8 mm,长约7 cm。孢子叶轮生,约8-10轮生。在每一孢子叶的近轴侧附着孢子囊。孢子叶球为异型孢子,小孢子为点孢子类型。大叶从线形到长圆形不等,具有全缘的侧缘,但在先端稍裂。小叶子通常与大叶子一样,但要窄得多。整株植物可能是一种小型乔木,有多叶的枝条和球花形成树冠,而不是像以前所理解的那样是一种水生植物,有较大的叶子漂浮在水面上。新种的特征支持了丁格孢属与Noeggerathiales的亲缘关系,也支持了Noeggerathiales与原裸子植物门的亲缘关系。
nov. are both sprouting from a common stem, and consequently improve our understanding of the whole plant morphology of this enigmatic taxon of the Cathaysian flora. The strobili are cylinder-like, 1.7–2.5 cm in diameter and over 20 cm in length, with a basal stalk 7–8 mm in width and about 7 cm long. Sporophylls are verticillate, with approximately 8–10 in a whorl. On the adaxial side of each sporophyll a sporangium is attached. The strobilus is heterosporous and the microspores are of the Punctatisporites type. Large leaves vary from linear to oblong with entire lateral margins but are slightly lobed at the apex. Small leaves are generally the same as the large leaves but much narrower. The whole plant is probably a small arborescent tree with leafy shoots and strobili forming a crown, rather than a water plant with larger leaves floating on the surface of the water as previously understood. Features of the new species are in favor of the close affinity between Tingia Halle and Noeggerathiales, and accordingly the affinity of Noeggerathiales to Progymnospermophyta.
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