Haecker
Diagnosis: Shell ovate, with triangular mesh openings. Stout radial tubes with brownish thick walls, about as long as tangential bars, distally with 2 whorls of 2 to 5 (generally 3) branches with terminal spathillae. Branches in inner whorl slightly longer, very slightly curved; in outer whorl shorter, generally arranged in a crown.
Diameter: one whole specimen reported as 3.0 by 3.5 mm.