The Echinoid Directory

Glyphocyphus d\'Archiac & Haime, 1853, p. 202

Diagnostic Features
  • Test small, inflated.
  • Apical disc moderately large. monocyclic, with plates firmly bound to the corona. Five gonopores. Periproct opening large and ovate, not angular.
  • Ambulacra straight, trigeminate, with uniserial pore zones throughout. Plating acrosaleniid, with a pair of elements united by a primary tubercle and alternating with a simple element; the lower of the two united elements is the larger. No phyllodes.
  • Intgerambulacral zones only a little wider than ambulacral zones. Each with a single primary tubercle centrally placed. Adradial and interradial bands of granules well developed.
  • Primary tubercles with minute perforation and crenulate.
  • Distinct sutural pitting developed in both ambulacral and interambulacral zones; beneath primary tubercles.
  • Peristome about one-third test diamater; a little sunken. Buccal notches extremely feeble.
  • Spines and lantern unknown.
Cretaceous (Aptian-Turonian), Europe, North Africa
Name gender masculine
Echinus radiatus Goldfuss, 1829, p. 125, by subsequent designation of Lambert & Thiery, 1911, p. 193.
Species Included
  • G. carthusianum (Gras, 1848); Lower Aptian, Europe
  • G. radiatus (Goldfuss, 1829); Upper Albian-Cenomanian, Europe, North Africa.
Classification and/or Status
Euechinoidea, Camarodonta; Temnopleuroida;Glyphocyphidae

Distinguished from Hemidiadema by having a regular biseries of ambulacral tubercles in each zone.

Archiac, E. d' & HAIME, J. 1853. Description des animaux fossiles du groupe Nummulitique de l’Inde, 373 pp., 36 pls. Gide and. Baudry, Paris.

Smith, A. B. & Wright, C. W. 1993. British Cretaceous Echinoids. Part 3, Stirodonta 2 (Hemicidaroida, Arbacioida and Phymosomatoida, part 1). Monograph of the Palaeontographical Society (publication no. 593, part of vol. 147), 199-267, pls 73-92.