The Echinoid Directory

Lampadaster Cotteau, 1889, p. 88

Diagnostic Features	Test subconical and almost as tall as long; cordiform in outline. Lower surface flat. Apical disc with 8 gonopores, one each on genital plates and two on ocular plates II and IV. Frontal groove becoming deeply sunken at the ambitus and continuing to the peristome; hardly indenting the ambitus and absent adapically. Petals not strongly developed; pore-pairs with outer pore elongate, but with no strong difference between anterior and posterior columns. Plastron plating meridosternous. Episternals asymmetric. Periproct marginal with a slight rostral extension. Peristome small and forward facing. Small tubercles distributed over all the aboral face. No distinct ambital band. No fascioles.
Distribution	Late Cretaceous (Campanian-Maastrichtian), Madagascar.
Name gender	masculine
Type	Lampadaster grandidieri Cotteau, 1889, p. 88, by original designation.
Species Included	L. grandidieri Cotteau, 1889; Campanian-Maastrichtian, north Madagascar
Classification and/or Status	Holasteroida, Meridosternata, Stegasterina, Stegasteridae. Monotypic?
Remarks	Only Guettaria amongst the holasterids has supplementary gonopores in its ocular plates. Lampadaster differs from that genus in having only fine tuberculation aborally, without obvious major tubercles. Very like Seunaster in appearance, but with supplementary gonopores in ocular plates II and IV. Lambert (1896) attributed a second species to this genus, L. gauthieri Lambert, 1896, from the Campanian-Maastrichtian of north Madagascar. This resembles Gauthieria in having a well-developed anterior sulcus from peristome to apex, and like Gauthieria, has auxilliary gonopores in ocular plates II and IV. Cotteau, G. H. 1889. Bulletin de la Societe geologique de France Serie 3, 14, p. 88. Lambert, J. 1896. Note sur quelques echinides Cretaces de Madagascar. Bulletin de la Societe geologique de France, Serie 3, 24, 313-332.