The Echinoid Directory

Echinolampas (Craterolampas) Cotteau, 1891, p. 186

[=Cylindrolampas Lambert, 1918, p. 44, type species Echinolampas subcylindricus Desor, 1852 ]

Diagnostic Features
  • Test large, elongate, narrow, highly inflated with steep sides, posterior margin projecting slightly; adoral surface deeply depressed around peristome.
  • Apical system slightly anterior, monobasal, with four genital pores.
  • Petals broad, open, extending two-thirds distance from apical system to margin; poriferous zones unequal, [in type species with seven more pore-pairs in posterior poriferous zones of petals II and IV, fourteen more in anterior zones of petals I and V, distal portion of petal III unknown]; poriferous zones narrow, pores conjugate, slightly elongated transversely.
  • Periproct inframarginal, slightly wider than long.
  • Peristome anterior, pentagonal, wider than long, deeply depressed.
  • Bourrelets weakly developed, curving convexly into peristome.
  • Phyllodes weakly developed, single pored, with few pores arranged in two series in each half ambulacrum.
  • Buccal pores present.
Distribution
Middle Eocene (Lutetian) of France.
Name gender feminine
Type
Echinolampas raulini Cotteau, 1863, p. 107; by original designation.
Species Included
Classification and/or Status

Irregularia; Cassiduloida; Echinolampadidae.

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

Remarks

Echinolampas (Craterolampas) can be differentiated from Echinolampas (Echinolampas) by its elongate, cylindrical, highly inflated test, and by its poorly developed, weaker phyllodes. The phyllodes of Echinolampas (Craterolampas) have a strong outer series, with only a faint inner series; while in E. (Echinolampas) there are typically two or three strongly developed series in each half-ambulacrum.

Kier (1962, p. 110) considers the type species of Craterolampas to be subjective junior synonym of Echinolampas Gray, 1825.

G. Cotteau 1889-1894. Paleontologie francaise. Terrain Tertiaire. Echinides Eocenes. G. Masson, Paris. vol. 2, 789 pp., pls. 201-384.

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