UK Ammonite Menuites IF-UKA-16-006Menuites portlocki complexus Pierre Formation Upper Cretaceous (Campanian) Lyman County, South Dakota This is a wonderful example of this rare genus. It is the macroconch form and has very well preserved original shell. In several spots the shell is thin, and the suture pattern can be seen. The ammonite is 7 inches across. This specimen has no repair or restoration. The genus Menuites shows the varied differences between macroconch and the microconch.