Allkaruen koi was named by Codorniú et al. (2016) [Small pterosaur diagnosed by the following unique combination of skull characters present in the holotype (autapomorphies marked with asterisk): frontal with large pneumatic foramen on the postorbital process; dorsal occiput faces posterodorsally and occipital condyle faces posteroventrally; long, rod-like basipterygoid processes diverging at approximately 20–25 degrees. The referred mandibular and vertebral materials also show a unique combination of characters that include a long lower jaw with a concave profile in lateral view; four-five large, septated, and well-separated anterior alveoli followed by a posterior alveolar groove*; mid-cervical vertebrae elongate with low neural arch and blade-like neural spine; pneumatic foramina on lateral surface of the centrum and peduncle of the neural arch; reduced diapophyseal process lacking articular surface; absence of accessory zygapophyseal processes.]. Its type specimen is MPEF-PV 3613, MPEF-PV 3609, MPEF-PV 3615, a partial skeleton (Braincase, mandible, cervical vertebrae), and it is a 3D body fossil. Its type locality is La Lluvia, Canadón Carrizal, which is in a Toarcian/Bajocian lacustrine - small limestone in the Cañadón Asfalto Formation of Argentina.