The Echinoid Directory

Libyolampas Lambert, 1914, p. 112

Diagnostic Features
  • Test of moderate size, subcircular in outline, domed in profile with a flat adoral surface.
  • Apical disc subcentral; monobasal, with four gonopores.
  • Petals long, straight, with narrow poriferous zones; open distally. Pores slightly conjugate, outer pore of pore-pair elongated transversely, inner pore round; poriferous zones of unequal length in the same petal.
  • Peristome subcentral, pentagonal, transverse, wider than long.
  • Periproct situated on the flat oral surface, transverse.
  • Phyllodes short but strongly developed, single pored, with three series in each half ambulacrum.
  • Bourrelets: phyllodes slightly sunken creating \'pseudobourrelets\' which incorporate post-basicoronal plates, forming weakly rounded mounds close to peristome.
  • Buccal pores present.
  • Tubercles the same size adorally as adapically.
  • Narrow, naked, granular zone in interambulacrum 5.
Eocene of Egypt.
Name gender feminine
Echinolampas africanus de Loriol, 1880, p. 34; by original designation.
Species Included
  • L. africanus (de Loriol, 1880); Eocene, Egypt
Classification and/or Status

Irregularia; Cassiduloida; Echinolampadidae.

Subjective junior synonym of Hypsoclypus Pomel, 1869.


Libyolampas is very similar to Hypsoclypus, in having long open parallel petals (that are slightly asymmetrical, the poriferous zones of unequal length in the same petal), a circular ambital outline, and a distinctly flat oral surface, where the periproct is situated.

P. M. Kier. 1962. Revision of the cassiduloid echinoids. Smithsonian Miscellaneous Collections, 144 (3) 262 pp.

Lambert, J. 1914. Revue critique de Paleozoologie 18, p. 112.