TWO NEW FAN-VEINED SPECIES FROM THE CARBONIFEROUS OF QINLING MT., SHAANXI

The general aspects of the floral assemblage from the Carboniferous of the Qinling Mt. area have been described (Sze H C,1953; Deng Bao,1978; Wu Xiuyuan and Deng Bao,1983). In the assemblage, a number of species with archaeopterid venation have been recorded. They include Cardiopteridium spetsbergense Nathorst, C.nanum (Eichwald), Triphyllopteris collombiana Schimper, Adiantites sp. and Cardiopteris? sp. from the Visean Eryuhe Formation, and Anisopteris petiolata Hirmer from the Namurian to Early Westphalian Caoliangyi Formation. In the current study, two new species with archaeopterid venation are reported. Adiantites honghuapuensis sp. nov. is discovered from the Caoliangyi Formation of Fengxian, Shaanxi. It was not described in the previous study (Wu Xiuyuan and Deng Bao, 1983), since it could not be definitely assigned to a certain genus due to the unusual morphological character. In recent years, some fronds morphologically similar to the new species have been recorded from the Namurian of Dashitoujing, Shikongzhen, Zhongning, Ningxia, and assigned to various genera such as Adiantites cf. cardiopteroides Read (Zhang Shanzhen et al., 1992) and Cardiopteris ningxiaensis Chen, Sun et Zhou (Chen Fen et al., 1994). They often occur in the Carboniferous (mostly the Namurian) of Shaanxi, Gansu and Ningxia. Qinlingopteris orientalis gen. et sp. nov. is discovered from the Eryuhe Formation of Maoping in Zhenan , Shanxi. It has intercalary pinnule so as to be very significant stratigraphically and botanically. Therefore, herein we particularly describe these two species, with comparison to some fronds alike.

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Clc Number:

Q914.645