The Jurassic orthopteran Allaboilus gigantus Ren and Meng, 2006 (Prophalangopsidae) from Beipiao, Northeast China and its biostratigraphical significance

The orthopteran Allaboilus gigantus Ren and Meng, 2006 (Prophalangopsidae) is reported based on a male forewing from the Middle-Upper Jurassic Haifanggou Formation of Beipiao, western Liaoning, China. This discovery greatly extends the distribution of the species from Daohugou in Inner Mongolia eastwards to Beipiao in western Liaoning. It further provides new evidence for correlation of the Daohugou Beds with the Haifanggou Formation indicating a Callovian-early Oxfordian age for the Daohugou Beds.