Borgert
Diagnosis: Spheroidal lattice shell with triangular mesh openings. Radial tubes about as long as tangential bars, 2-5 whorls of 3-5 curved lateral branches on distal half of tubes, terminal whorl of 2-4 (usually 3) short, curved branches, paired lateral branches sometimes on proximal half of tubes, lateral branches pointed or rounded.
Diameter 1.2-2.7 mm.