Width 10.1 mm; 5.5 whorls; body whorl with 4 riblets per
mm.
Parietal tooth angled and tapering toward columella; umbillicus nearly doubled in size at body whorl.
Height 6.3 mm; lip usually buttressed on columellar side of lower tooth; lip teeth small and rather pointed, upper tooth broader and rounded in older specimens, but not truncate.
Body whorl descending before upper lip and upper lip projecting forward rather than upward where it joins body whorl; aperture angled backward about 50 degrees from vertical.
Aperture quadrate; parietal tooth directed toward outer lip above upper lip tooth; upper lip tooth more distant from juncture of upper lip and parietal callus than lower lip tooth is from juncture of lower lip and parietal callus.
Upper lip tooth moderately recessed.
Notes - Photos of specimen from Illinois, Jefferson Co., 3 mi S of Mt. Vernon, under redbud with vinca groundcover plantings next to building at roadside rest area along hwy 64; very abundant at this locality; originally discovered by Frieda Schilling. The site where these specimens were found is well shaded and within 100 ft. of natural forest. The forest has not been checked to determine if the species is more generally distributed in the area vs. occuring just in the disturbed area near the building.
Also found in Missouri at St. Louis City, SE Corner of Missouri Botanical Gardens, at base of wall outside gardens, 1 dead specimen.
Width range, 9.1- 11.5 mm.
Averages from sample of 10 specimens:
| width | 10.2 mm |
| height | 5.6 mm |
| whorls | 5.3 |
| umbilicus width | 1.8 mm |
| height to width ratio | 0.55 |
| whorl to width ratio | 0.52 |
| umbilicus to width ratio | 0.18 |
Identification verified by H. G. Lee, 08-15-02.