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.
Distribution	Cretaceous (Aptian-Turonian), Europe, North Africa
Name gender	masculine
Type	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
Remarks	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.