C1. Calice or valley width

The internal diameter of a corallite or corallite series (valley)

Character State	Definition	Illustration
small (<1.5mm)	small (<1.5mm)
medium (1.5-10 mm)	medium (1.5-10 mm)
large (10-15mm)	large (10-15mm)
very large (>15mm)	very large (>15mm)