"Talarurus" was a medium sized ankylosaur, Thomas Holtz and Gregory S. Paul estimated its length at , Paul gave a weight of , however, Holtz estimated it around . Like other ankylosaurids, it had a wide rostrum (beak), a formidable osteoderms running across its body, forming an extensive armor, and the famous tail club. Its limbs were robust and short, supporting a wide and rounded belly. Diagnoses provided by Maleev 1956 and Tumanova 1987, were of limited utility as they largely listed traits shared with many other ankylosaurids. Arbour also noted that the foot in fact had three toes. She established a single autapomorphy: on the frontals, at the middle skull roof, a raised V- shaped region is present. Also she determined that "Talarurus" differed from all known ankylosaurids with the exception of the American "Nodocephalosaurus" in the possession of caputegulae on the frontals and nasals, that are cone-shaped with a circular base. However, according to Parks et al. 2019, "Talarurus" can be distinguished based on diverse rostral characteristics, such as the prominent internarial caputegulum, elongated caputegulum, the numerous caputegulae surrounding the nasal area, conical/polygonal-shaped caputegulae, among others. The skull of "Talarurus" measured about in total length. The holotype, PIN 557-91, is based only on a posterior skull roof, which features tubercle-like caputegulae (facial osteoderms or armor tiles) that resemble those of "Nodocephalosaurus". As noted by Arbour and Currie, the skull roof of PIN 3780/1 appears to have slightly different caputegulae (head osteoderms or armour tiles), and that it was unclear if this represents a taxonomic issue. Nevertheless, all the referred skulls share the same patterns of caputegulae (although little variation among individuals is observable) and therefore referable to the genus. The most complete skull is MPC-D 100/1354. It nicely preserves the maxillary rostrum, which is broad and semi-rectangular in shape and fused, no teeth are found in this zone; probably useful on flat surfaces. As expected, the caputegulae are poligon to tubercle-shaped, with some being present on the nasal area.