Figures 1–15.Cyclostremiscus mohicanus sp. n. types 1 holotype MZSP 106551 (W 2.8 mm), apical view 2 same, umbilical view 3 same, apertural view 4 same, apertural-slightly apical view 5, same, apertural-slightly umbilical view 6 paratype MZSP 106552 #1, apical view (W 1.8 mm) 7 same, umbilical view 8 #2, apical view (W 1.7 mm) 9 #1, apertural-slightly apical view 10 same, apertural view 11 #3, SEM, apertural-slightly apical view (W 1.7 mm) 12 same, apertural view 13 same, apertural-slightly umbilical view 14 #4, SEM, apical view (W 1.5 mm) 15 same, detail of apical region, scale 0.1 mm.