The Echinoid Directory

Progonolampas Bittner, 1892, p. 357

Diagnostic Features	Test of moderate size, oval in outline, pointed posterior extremity, inflated, greatest width posterior to centre, with a relatively flat adoral surface. Apical disc anterior; monobasal with four gonopores and a large, slightly inflated madreporite. Petals moderately developed; slightly bowed and open distally. Pore-pairs subconjugate and round; the two columns in each petal of unequal length; pores beneath petals single. Peristome anterior, depressed, subpentagonal, transverse. Periproct inframarginal and transverse. Phyllodes moderately developed, single pored, with two series in each half-ambulacrum, plus a few scattered pores in between. Bourrelets weakly developed; confined to walls a distinct well leading to the peristome opening. Buccal pores present.
Distribution	Upper Eocene to Upper Oligocene of Australia and Cuba.
Name gender	feminine
Type	Progonolampas novae-hollandiae Bittner, 1892, p. 357 [=Echinolampas posterocrassa Gregory, 1890, p. 483]; by original designation. Holotype NHM E3381.
Species Included	P. posterocrassa (Gregory, 1890); Upper Eocene, Australia. P. posterocrassa curtata McNamara & Philip, 1980; l;ate Oligocene, early Miocene, Australia P. moronensis Sanchez Roig, 1953; Upper Oligocene, Cuba. P. torrense Sanchez Roig, 1953; Upper Oligocene, Cuba.
Classification and/or Status	Irregularia; Cassiduloida; Echinolampadidae. Subjective junior synonym of Echinolampas (Echinolampas) Gray, 1825.
Remarks	Progonolampas has all the diagnostic characters of Echinolampas, with asymmetric petals (the two pore series in each petal of unequal length), an inframarginal periproct on a relatively flat adoral surface that is slightly sunken towards the peristome, and feeble bourrelets. The type species of Progonolampas belongs to the subgenus E. (Echinolampas) as it has petals that are slightly bowed, with subconjugate pores of almost equal size, the outer pores not greatly elongated transversely, and phyllodes with only two distinct series in each half-ambulacrum. Bittner, A. 1892. S. B. Akad. Wien 101 (1), p. 359. Kier (1962, p. 113) considers Progonolampas to be a subjective junior synonym of Echinolampas Gray, 1825. P. M. Kier. 1962. Revision of the cassiduloid echinoids. Smithsonian Miscellaneous Collections, 144 (3) 262 pp.