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The Echinoid Directory

Echinolampas (Echinolampas) Gray, 1825, p. 429

[=Euechinolampas Pomel, 1887, p. 127, type species Echinolampas florescens Pomel, 1887; =Isolampas Lambert, 1906, p. 33, type species Echinolampas goujoni Pomel, 1888; =Progonolampas Bittner, 1890, p. 357, type species Progonolampas novae-hollandiae Bittner, 1892]

Diagnostic Features
  • Test of medium size, subcircular in outline, with a slightly pointed posterior extremity; inflated, with a relatively flat adoral surface, slightly sunken towards the peristome.
  • Apical disc subcentral to anterior; monobasal, with four gonopores.
  • Petals well developed; bowed, and open distally. Pore-pairs small, subconjugate, and circular, the outer series of pores not greatly elongated transversely. The two columns of pore-pairs in each petal of slightly unequal lengths; pores beneath petals single.
  • Peristome subcentral, pentagonal, transverse, wider than long.
  • Periproct inframarginal and transverse; not sunken.
  • Phyllodes short, single pored, with two series in each half-ambulacrum, plus scattered pores in between.
  • Bourrelets slightly developed; basicoronal plates short, with a distinct well leading to the peristome opening.
  • Buccal pores present.
  • Tubercles the same size adorally as adapically.
Distribution
Eocene to Recent, worldwide distribution.
Name gender feminine
Type Echinanthus ovatus Leske, 1778, p. 127; by subsequent designation of Pomel, 1883, p. 62.
Species Included
Classification and/or Status  Irregularia; Cassiduloida; Echinolampadidae.

Monophyletic; treated here as a subgenus of Echinolampas Gray, 1825.
Remarks

The subgenus Echinolampas (Echinolampas) includes all species of Echinolampas that have petals that are bowed (not straight), with subconjugate pores of almost equal size, the outer pores not greatly elongated transversely, and the two columns in each petal of only slightly unequal lengths. The phyllode development in this subgenus differs in that phyllodes consist of only two distinct series in each half-ambulacrum, plus scattered pores in between.

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