Two New Pelycosaurs from the Lower Permian of Oklahoma

This pamphlet is intended to announce the discovery of two new small pelycosaurs, from fissure deposits of early Permian age collected from a limestone quarry near Fort Sill, Oklahoma. The newly discovered pelycosaurs are Thrausmosaurus serratidens and Delorhynchus priscus. As a note to readers, pelycosaurs is an older term—species that used to be called such are nowadays referred to as stem mammals, protomammals, and basal or primitive synapsids.