Colonies are encrusting, multiserial and sheet-like, with a stepped growing edge. The ancestrula is either ascophoran or tatiform (with a partial closure plate), more or less circular in outline, about 0.3 mm in diameter, with a longitudinally elliptical orifice and a convex frontal shield/closure plate ringed by about 8 spine bases.
Autozooids are elongate, rounded-rhomboidal in outline shape, about 0.60-0.70 mm long by 0.40-0.50 mm wide (fide Lagaaij 1952, p. 89). The frontal shield is convex and imperforate, except for a double row of marginal areolar pores reported by Lagaaij (1952) but which are closed by diagenetic cement in available specimens from the Coralline Crag. A thick, slightly flared peristome surrounds the orifice. The secondary orifice is hemielliptical with a straight proximal edge often containing a short median suboral denticle. It measures 0.12 mm long by 0.14-0.16 mm wide (fide Lagaiij 1952). Oral spines are lacking. The ovicell is globular, recumbent on the distal zooid, seemingly imperforate, and has a narrow opening above the distal edge of the primary orifice.