The Echinoid Directory

Vologesia Cotteau & Gauthier, 1895, p. 65

Diagnostic Features
  • Test of medium to large size, ovate with smooth marginal outline; flattened adorally, uniformly domed aborally.
  • Apical system tetrabasal with genital plates other than the madreporite greatly reduced in size.
  • Petals broad, open, subequal in length and with the two columns equally developed. Outer pore of petaloid pores very elongated transversely, slit-like, joined to inner pore by narrow conjugation groove. Ambulacral plates beyond petals with single pores.
  • Peristome anterior, wider than long, pentagonal; invaginated with vertical walled entrance.
  • Periproct inframarginal, transverse.
  • Bourrelets confined to verticval walled entrance to peristome; not swollen.
  • Phyllodes broad, single pored, slightly bowed, with three series of pores in each half-ambulacrum.
  • Buccal pores present.
  • Naked interradial zone running between peristome and periproct, covered in fine granules.
Upper Cretaceous (Campanian-Maastrichtian) of Europe United Arab Emirates and Oman.
Name gender feminine
Vologesia tataosi Cotteau & Gauthier, 1895, p. 66; by monotypy. Holotype: University of Lyon Palaeontological Collections EM 40798.
Species Included
  • Vologesia tataosi Cotteau & Gauthier, 1895; Campanian, Iran.
  • Vologesia rawdahensis Ali, 1989; Maastrichtian, UAE-Oman border region.
Classification and/or Status
Irregularia; Cassiduloida; Echinolampadidae.

Vologesia resembles Clypeolampas in overall test shape, and in the position and shape of the periproct. Vologesia is distinguished from Clypeolampas by its very different phyllode structure and peri-oral surface. Clypeolampas has a more central peristome with adoral interambulacral plates elevated and complex phyllodes with many intermediate pores (Smith & Jeffery, 2000).

Cotteau, G. & Gauthier, V. 1895. Echinides fossiles. Mission scientifique en Perse 3. Etudes geologiques Partie II, Paleontologie. Echinides fossiles. 107 pp, 16 pls.

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

A. B. Smith & C. H. Jeffery. 2000. Maastrichtian and Paleocene echinoids: a key to world faunas. Special Papers in Palaeontology 63, 406 pp.