Xenosaurus grandis agrenon was named by King and Thompson (1968) [Relatively small, moderately stocky. Head broadly triangular, thick. Snout moderately pointed. Head 0.79-0.96 ( 0.87) times as wide as long, 0.52-0.59 ( 0.55) times as wide as high, 0.23-0.30 ( 0.25) times snout-vent length. Canthus temporalis weak, consisting of a longitudinal postorbital series of slightly enlarged scales distinctly set off from smaller granular temporal scales. Dorsal head scales rugose, not forming a distinct pattern. Rostral about equal to, or slightly less than width of mental. Nostril confined to a single large scale. Supralabials 11-13 ( 11-12) on each side, totaling 23-26 ( 23); convex, moderately keeled in the orbital region. Infralabials 9-11 ( 11-10) on each side, totaling 18-21 ( 21); flat-sided, becoming strongly keeled posteriorly. Supraorbital semicircles consist of a series of rugose, strongly keeled scales, that may be in contact middorsally or separated by a single row of scales. Superciliaries 11-13 ( 12-13), and suboculars 10-13 ( 10), on each side. Superciliaries and suboculars terminate abruptly at anterior corner of orbit. A longitudinal series of 3-4 enlarged hexagonal, wider than long, supraoculars present. Suboculars separated from supralabials by a longitudinal series of scales that originate in the loreal region and terminate behind the orbits, or may curve up to the canthus temporalis. Temporal region with large, rounded conical tubercles separated from each other and the canthus temporalis by 1-4 rows of minute granules. Tympanum covered with a thick membrane with small, granular scales. Mental followed posteriorly by two large chinshields, each in contact with one or two infralabials on each side, and followed posteriorly by two rows of enlarged scales that lie over the mandibles. Throat and gular region covered with small elongate granular scales that are arranged in oblique longitudinal rows. Gular fold well-developed. An additional weak fold extends from the retroarticular region of the jaw to the scapular region. Chest covered with flat, relatively large scales arranged in oblique transverse series, but not separated midventrally. Transverse rows of scales between axilla and groin, 32-38 ( 36); 19-22 ( 22) scales per row at the widest part of belly. Preanal scales slightly enlarged, separated from ventrals by 2-3 rows of smaller scales. A well-developed lateral fold extends from axilla to groin. Tubercles above lateral fold primarily arranged in oblique longitudinal rows, and secondarily in transverse rows. Paravertebral rows of enlarged tubercles present. Enlarged tubercles on dorsal surface of arm separated from each other by 1-2 rows of minute granules. Tubercles on dorsal surface of legs about equal to those on arms, but more widely spaced. Tail 0.78-0.97 ( 0.87) times snout-vent length. Total length, 150-186 (186) mm; snout-vent length, 73-102 ( 99) mm; head length, 22.0-25.3 ( 25.3) mm; head width, 17.5-22.7 ( 22.0) mm; thickness of head, 9.4-12.1 ( 12.1) mm. The groundeolor of the head is dark brown. The ventral edge of the posterior supralabials is black. A light brown subocular stripe extends caudad to the neck where it swings toward the midline and usually fuses with the one from the opposite side. The light subocular stripe is bordered above by a dark br6wn to black subcanthus temporalis stripe that ends abruptly above the tympanum. A dark brown to black W-shaped mark on the neck is bordered cranially by the subocular stripe, and caudally by a sharp to ill-defined light brown chevron. The trunk groundcolor is medium to dark brown. The trunk pattern consists of three to four black-edged medium brown crossbands between the axilla and the groin, which may be continuous across the midline, but are characteristically broken into blotches. In UIMNH 69374-69376, the dark edges to the crossbands are broken into diffuse spots which are fused into a crude reticulate pattern. In UIMNH 69373, the dark edgds of the crossbands and the derived black reticulum are so broad and dense that only remnants of the light crossbands remain as light blotches. The tubercles within these light blotches are light brown to white. The tail is alternately banded with Iight brown and dark brown to black crossbands. Ventrally, the dark bands usually have light centers ( fig. 5b) or contain a primary light spot (fig. Sc). There are usually more than six ventral dark bars, but in some specimens they may be obscure (such as in the holotype, UIMNH 69375), reduced (UIMNH 69376), or absent ( AMNH 19383).]. It is extant. Its type specimen is UIMNH 69875, an other (An adult female).

It was recombined as Xenosaurus agrenon by Bhullar (2011).