A new homosporous, arborescent lycopsid from the Middle Devonian of Xinjiang, Northwest China

被引：25
|
作者：
Xu, Hong-He [1 ]
Wang, Yi [1 ]
Wang, Qi [2 ]
机构：
[1] Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Peoples R China
[2] Chinese Acad Sci, Inst Bot, State Key Lab Systemat & Evolutionary Bot, Beijing 100093, Peoples R China
来源：
PALAEONTOLOGY | 2012年 / 55卷
基金：
中国国家自然科学基金;
关键词：
Homospory; Hoxtolgaya; Middle Devonian; arborescent lycopsids; PALEOGEOGRAPHIC SIGNIFICANCE; SUBLEPIDODENDRACEAE; LECLERCQIA; HASKINSIA; LYCOPHYTE; GRIERSON; SPORES; BANKS; NOV;
D O I：
10.1111/j.1475-4983.2012.01177.x
中图分类号：
Q91 [古生物学];
学科分类号：
0709 ; 070903 ;
摘要：
A new arborescent lycopsid, Hoxtolgaya robusta gen. et sp. nov., is described from the Middle Devonian of Xinjiang, Northwest China. It has stems up to 90 mm wide with fusiform leaf bases and long linear microphylls. Sporophylls are not aggregated into strobili and are isomorphic, with sporangia homosporous and bearing Acinosporites-type microspores. A syndrome of characters in Hoxtolgaya, including the arborescence and the homospory, implies that the arborescent habit is not necessarily correlated with the heterospory in the early evolution of arborescent lycopsids. Homosporous, arborescent lycopsids probably represent one of the transient forms between the Devonian herbaceous protolepidodendrids and the DevonianCarboniferous heterosporous arborescent lycopsids.
引用
收藏
页码：957 / 966
页数：10
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