- 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.
Eocene to Recent, worldwide distribution.
||Echinanthus ovatus Leske, 1778, p. 127; by subsequent designation of Pomel, 1883, p. 62.
- E. (Echinolampas) ovata (Leske, 1778); Lower Miocene to Recent, Indo-Malaysia
- E. (Echinolampas) florescens Pomel, 1887; Eocene, Algeria
- E. (Echinolampas) goujoni Pomel, 1888; Eocene (Lutetian), Algeria
- E. (Echinolampas) novae-hollandiae (Bittner, 1892); Upper Eocene to Upper Oligocene, Australia, Cuba
- E. (E.) posterolatus Gregory, 1891; Upper Oligocene, Malta.
- E. (E.) garoensis Srivastava et al. 2008; Eocene (Lutetian-Bartonian), India.
|Classification and/or Status
|| Irregularia; Cassiduloida; Echinolampadidae.
Monophyletic; treated here as a subgenus of Echinolampas Gray, 1825.
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.