A new species: Szea (Cladophlebis) henanense sp. nov. in Henan Province and its evolutional significance

摘要

Oligocarpia and Chansitheca, which are subordinated to Gleicheniacea, were reported long ago in the Permian of North China. Yao and Taylor discovered several specimens of fertile fronds possessing gleicheniaceous characters in Funiushan Coalfield of Zhenjiang in Jiangsu Province. These characters are different from those of Oligocarpia and Chansitheca. After detailed study on reproductive organs in situ, they established a new genus-Szea and assuredly assigned it to Gleicheniaceae. Yao et al. also ascribed some speciments, which were collected from Jiangsu, Fujian, Guizhou and Yunnan provinces and were formerly assigned to Cladophlebis, to Szea. They established a new genus-Lixotheca for specimens from North China, which were previously described asCladophlebis permica Lee et Wang and Cladophlebis henanensis Zhang et Mo. In recent years, the authors collected some similar specimens from Pingdingshan Coalfield and Yuzhou area of Henan Province. According to the characters of their reproductive organs of fertile fronds and shape of sterile fronds, the authors set up a new species of Szea for these specimens.