Calliostoma spec. 1

(Figure 39)

Material. Anda 4 (1).

Characterization. Shell conical, H 1.9 mm, W 1.8 mm; DN 0.21; P/T boundary at 1.0 whorls characterized by sudden onset of teleoconch ornamentation of axial and radial ribs with knobs at intersections; base of body whorl with spiral ribs; umbilicus apparently closed.