The new fossil specimens of Protorthophlebia Tillyard,1933 collected from the Middle Triassic grayish green mudstone and shale of the Upper part of Lower Member,Middle Triassic Tongchuan Formation ( T 2 2t...The new fossil specimens of Protorthophlebia Tillyard,1933 collected from the Middle Triassic grayish green mudstone and shale of the Upper part of Lower Member,Middle Triassic Tongchuan Formation ( T 2 2t ) in Tongchuan Shaanxi Province,China are reported and two new species Protorthophlebia ladinica sp.nov. and P.triassica sp.nov. are described. A key to 10 species of genus Protorthophlebia is provided.展开更多
The generic classification of the family Orthophlebiidae is revised systematically in the present paper. Genera Orthophlebia and Protophlebia are remained in the family Orthophlebiidae while genus Mesophlebia is disas...The generic classification of the family Orthophlebiidae is revised systematically in the present paper. Genera Orthophlebia and Protophlebia are remained in the family Orthophlebiidae while genus Mesophlebia is disassembled, in which the species are ascribed to Orthophlebia if Rs1 at least with 3 branches, and to Protophlebia if Rs1 only with 2 branches. Three subgenera are erected in Orthophlebia and Protophlebia respectively according to the relationship between stems of Rs and MA, i.e. Rs forking earlier or later than MA, or at the same level as MA.展开更多
文摘The new fossil specimens of Protorthophlebia Tillyard,1933 collected from the Middle Triassic grayish green mudstone and shale of the Upper part of Lower Member,Middle Triassic Tongchuan Formation ( T 2 2t ) in Tongchuan Shaanxi Province,China are reported and two new species Protorthophlebia ladinica sp.nov. and P.triassica sp.nov. are described. A key to 10 species of genus Protorthophlebia is provided.
基金the Beijing Natural Science Foundation (5052013)the Program of the Excellent Young Scientists of the Ministry of Land Resources(2005)
文摘The generic classification of the family Orthophlebiidae is revised systematically in the present paper. Genera Orthophlebia and Protophlebia are remained in the family Orthophlebiidae while genus Mesophlebia is disassembled, in which the species are ascribed to Orthophlebia if Rs1 at least with 3 branches, and to Protophlebia if Rs1 only with 2 branches. Three subgenera are erected in Orthophlebia and Protophlebia respectively according to the relationship between stems of Rs and MA, i.e. Rs forking earlier or later than MA, or at the same level as MA.
