The Echinoid Directory

Rhoechinus Keeping, 1876, p. 37

Diagnostic Features
  • Test shape unknown; plating imbricate.
  • Apical disc unknown.
  • Ambulacra bigeminate, narrow and straight; pore-pairs undifferentiated; uniserial and adradial.
  • Interambulacral plates irregularly polygonal with multiple small tubercles; four or five columns but plates not forming horizontal rows.
  • Spines and lantern unknown.
Lower Carboniferous, Ireland.
Name gender masculine
Rhoechinus irregularis Keeping, 1876, p. 37, by original designation.
Species Included
  • Only the type species.
Classification and/or Status

Stem group Echinoidea.

Monotypic; indeterminate.


Based on a single poorly preserved specimen. Too poorly known to be able to place in any family with confidence. The taxon is here restricted to the type material and treated as a nomen dubium.

Jackson, R. T. 1912. Phylogeny of the Echini, with a revision of Palaeozoic species Memoirs of the Boston Society of Natural History 7, 491 pp. 76 pls.

Keeping, W. 1876. Quarterly Journal of the Geological Society 32, p. 37.