Pawpawsaurus, meaning "Pawpaw Lizard", is a nodosaurid ankylosaur from the Cretaceous (late Albian) of Tarrant County, Texas, discovered in May 1992.

The skull is complete enough for a 2016 study to be able to identify and reconstruct the brain, nasal cavities and inner ear of the specimen, and CT scan it to find new anatomical features.

[3] Vickaryous et al. (2004) have stated that "Sauropelta edwardsorum, Silvisaurus condrayi, and Pawpawsaurus campbelli form a basal polytomy nested deep to Cedarpelta.

[7] Sauroplites scutiger Mymoorapelta maysi Dongyangopelta yangyanensis Gastonia burgei Gargoyleosaurus parkpinorum Polacanthus foxii Peloroplites cedrimontanus Sauropelta edwardsi Nodosaurus textilis Tatankacephalus cooneyorum Silvisaurus condrayi Animantarx ramaljonesi Hungarosaurus tormai Europelta carbonensis Pawpawsaurus campbelli Borealopelta markmitchelli Struthiosaurus austriacus Stegopelta landerensis Panoplosaurus mirus Edmontonia rugosidens Edmontonia longiceps Denversaurus schlessmani Pawpawsaurus was primitive in regards to its sensory abilities when compared to later ankylosaurs.

The enlarged nasal cavities of Pawpawsaurus would also likely have been useful for cooling blood that was entering the brain, finding food and potential mates, or alerting it to danger.