Genus Havelockia Pearson, 1903

Diagnosis. Calcareous ring stout, only anterior projections of radial and interradial plates free; posterior paired processes of radial plates divided into several pieces. Body wall ossicles are tables, with a square to oval disc usually perforated by four large central and four smaller peripheral holes, the latter sometimes reduced or absent; spire of two pillars joined at apex and terminating in few blunt teeth (Thandar 1989).