Psammolampas has all the diagnostic characters of Echinolampas, with well developed, asymmetric petals, an inframarginal periproct on a relatively flat adoral surface that is slightly sunken towards the peristome, and feeble bourrelets. Psammolampas is very similar in test shape and outline to species within the subgenus E. (Echinolampas). However, it differs in having petals that are straight, where the outer pores are distinctly elongated transversely.
Lambert & Thiery (1909-1925) use the type species of Psammolampas for describing their section (subgenus) four of Echinolampas; to which they refer 18 species.
Lambert, J. 1913. Description des echinides des terrains neogenes du bassin du Rhone. Fasc. 3. Memoires de la Societe paleontologique Suisse 39, 103-152.
J. Lambert & P. Thiery. 1909-1925. Essai de nomenclature raisonnee des echinides. Libraire Septime Ferriere, Chaumont, 607 pp., 15 pls.