The Echinoid Directory

Euporophyma Gauthier, in Fourtau, 1901, p. 59

Diagnostic Features
  • Test small, probably low conical in profile with flat base; peristome rather deeply invaginated.
  • Apical disc moderately small, pentagonal with angles interradial; plating unknown.
  • Ambulacra straight; plating polygeminate (4 or 5 elements to a plate aborally, 3 subambitally), compounded in phymosomatid style. Pore-pairs undifferentiated; uniserial; probably no phyllodes.
  • A single primary tubercle to each compound plate; secondaries and granules few and at edges of plate.
  • Interambulacral plates wider than tall; with a central large primary tubercle, and a flanking adradial smaller secondary tubercle in ambital region.
  • Naked interradial band aborally.
  • Tubercles imperforate and crenulate.
  • Peristome rather deeply sunken.
  • Spines unknown.
  • Lantern unknown.
Turonian, Egypt and India.
Name gender neuter
Coptosoma lefebvrei Gauthier, in Fourtau, 1901, 57, by original designation.
Species Included
  • Only the type species.
Classification and/or Status

Euechinoidea, Phymosomatoida, Phymosomatidae.

Monotypic; ?subjective junior synonym of Cosmocyphus.


The specimen illustrated here comes from the Lambert collection and was presumably obtained from Gauthier. Smith (2010)  redescribed this species based on material from the Bagh Beds of India.

Fourtau, R. 1901. Notes sur les Echinides fossiles d'Egypt. Bulletin de l\'Institute Egyptien 4 serie 2, 33-117, pls 1-6.

Smith, A. B. 2010. The Cretaceous Bagh Formation: A Gondwanan window onto Turonian shallow water echinoid faunas. Cretaceous Research 31, 368-386.