Brandt
The shell bears 3-4 (up to 6) short tubes with perforated walls whose distal end is tapered, ending in a slanted pore provided with 1-2 conspicuous spines. Shell diameter: 65-100 µm. (C. Polycystina (Spumellaria)).
Ref.: Strelkov and Reshetnjak (1971), Nigrini and Moore (1979).