The Echinoid Directory

Phymopedina Pomel, 1883, p. 100

Diagnostic Features
  • Large depressed test with rounded ambitus.
  • Apical disc size and plating unknown.
  • Ambulacra straight; and narrow. Pore-pairs arranged uniserially throughout.
  • Plating trigeminate in diadematid style with all three elements reaching the perradius and with the central element largest. Single large ambulacral tubercle to each compound plate.
  • Interambulacral plates much wider than tall; with row of three or more subequal tubercles. Tubercles perforate and non-crenulate.
  • Secondary granulation sparse.
  • Lantern with grooved teeth.
  • Spines small and without cortex; hollow.
Jurassic (Bathonian to Portlandian), Europe.
Name gender feminine
Hemipedina marchamensis Wright, 1855, by subsequent designation of Lambert, 1900, p. 28.
Species Included
  • P. marchamensis (Wright, 1855); Oxfordian, England.
  • P. bouchardi (Wright, 1858); Portlandian, France.
  • P. legayi (Rigaux, 1885); Bathonian, France.
  • P. morrisi (Wright, 1858); Kimmeridgian, England
Classification and/or Status

Pedinoida, Pedinidae.


Very similar to Diademopsis Desor, 1855, but differing in having a row of three or more subequal tubercles on ambital and subambital plates.

Pomel, A. 1883. Classification méthodique et Genera des Échinides vivante et fossiles. Thèses présentées a la Faculté des Sciences de Paris 503, A. Jourdan, Alger, 131 pp.