The Echinoid Directory

Ananchytes Lamarck, 1816, p. 23

[=Ananchitis Lamarck, 1801, p. 347 (non Ananchytis Mercati, 1717) ]

Diagnostic Features
  • Test ovate with flat base and domed upper surface; no anterior sulcus.
  • Apical disc central, elongate; relatively large; with four gonopores.
  • All ambulacra flush, with identical, small, circumflexed pore-pairs adapically.
  • Plastron meridosternous, with a single sternal plate in contact with the labrum. Subsequent plates biserial.
  • Periproct inframarginal to oral.
  • No enlarged primary tubercles aborally.
  • No fascioles.
Upper Cretaceous to Palaeocene; Europe, central Asia.
Name gender unknown
Echinocorys ovatus Leske, 1778, p. 69, by original designation.
Species Included
A widely used name in the old literature.
Classification and/or Status

Holasteroida; Meridosternata; Echinocorythidae.

Subjective junior synonym of Echinocorys Leske, 1778.

Identical in all details of test structure to Echinocorys. Differs only in having a more rounded profile.

Lamarck, J. B. P. M. d 1816. Histoire naturelle des animaux sans vertèbres, présentant les caractères généraux et particuliers de ces animaux, leur distribution, leur classes, leurs familles, leurs genres, et le citation des principales espèces qui s'y rapportent; précédée d'une Introduction offrant la Détermination des caractères essentiells de l'animal, sa distinction du végétal et des autres corps naturels, enfin, l'Exposition des Principes fondamentaux de la Zoologie. Tome 2, 538 pp.; tome 3, 770 pp. Verdière, Paris.