Three well-preserved fossil species ofParandrexis longicornis Lu, Shih ＆ Ren sp. nov., P. agilis Lu, Shih ＆ Ren sp. nov. and P. oblongis Lu, Shih ＆ Ren sp. nov. are described and illustrated from the late Middle Ju...Three well-preserved fossil species ofParandrexis longicornis Lu, Shih ＆ Ren sp. nov., P. agilis Lu, Shih ＆ Ren sp. nov. and P. oblongis Lu, Shih ＆ Ren sp. nov. are described and illustrated from the late Middle Jurassic Jiulongshan Formation of Daohugou in Inner Mongolia Autonomous Region, China. These new species are distinguished from other described species of Parandrexis by body size, head dimension （ratio of length to width）, pronotum shape, and antennal characters. Based on new morphological data, we emend the generic diagnosis. These findings support the sexual size dimorphism of parandrexids and suggest a gymnosperm sap feeding habit by Parandrexis.展开更多
基金supported by the National Basic Research Program of China (973 Program) (2012CB821906)the National Natural Science Foundation of China (31230065,41272006)+1 种基金Great Wall Scholar and KEY project of the Beijing Municipal Commission of Education (KZ201310028033)Program for Changjiang Scholars and Innovative Research Team in University (IRT13081)
文摘Three well-preserved fossil species ofParandrexis longicornis Lu, Shih ＆ Ren sp. nov., P. agilis Lu, Shih ＆ Ren sp. nov. and P. oblongis Lu, Shih ＆ Ren sp. nov. are described and illustrated from the late Middle Jurassic Jiulongshan Formation of Daohugou in Inner Mongolia Autonomous Region, China. These new species are distinguished from other described species of Parandrexis by body size, head dimension （ratio of length to width）, pronotum shape, and antennal characters. Based on new morphological data, we emend the generic diagnosis. These findings support the sexual size dimorphism of parandrexids and suggest a gymnosperm sap feeding habit by Parandrexis.
