Aparchites
Shell not exceeding 3 mm in length, equivalved, subovate or oblong; hinge straight, ventral edge thickened, often beveled or channeled; surface convex, mostly in the ventral half, smooth (Bassler and Kellett, 1934).
Species
Aparchites minutissimus (Hall, 1875)
Occurrence: Fulton, Economy, Southgate, McMicken, Mount Hope, Fairmount, Bellevue, Corryville, Mount Auburn, Arnheim, Waynesville, Liberty, Whitewater, Elkhorn
Reference: Dalvé, 1948; Bassler and Kellett, 1934
Originally named Leperditia (Isochilina) minutissima
Aparchites oblongus Ulrich, 1890
Occurrence: Arnheim
Reference: Dalvé, 1948; Bassler and Kellett, 1934