Abstract
Abstract The new fossil specimens of Protorthphlebia Tillyd, 1933 collected from the Middle Triassic grayishgreen mudstone and shale of the Upper part of Lower Member, Middle Triassic Tongchuan Formation (T22t) 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 Rotorthphlebia is provided.
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