The Echinoid Directory

Loxechinus Desor, 1856, p. 136

Diagnostic Features
  • Large, depressed test.
  • Apical disc dicyclic, or sometimes with posterior oculars just exsert; periproct relatively large.
  • Ambulacral plating polygeminate, with 7-10 pore-pairs to a plate arranged in a wide arc, each separated by a row of secondary tubercles. Tending to form discrete columns adorally but not expanded.
  • Interambulacral plates with distinct primary and numerous secondaries aligned into rows.
  • spines short and simple.
  • globiferous pedicellariae with short neck, paired lateral teeth and open blade.
Recent; Chile and Peru.
Name gender masculine
Echinus albus Molina, 1782, by original designation.
Species Included
Only the type species.
Classification and/or Status

 Camarodonta; Echinidea; Parechinidae.


Easily distinguished from the rather similar Paracentrotus by the more numerous pore-pairs on each ambulacral plate. It closely resembles Strongylocentrotus in test appearance, differing only in that its globiferous pedicellariae have lateral teeth. Its dicyclic apical disc structure distinguishes it from Strongylocentrotus.

Desor, E. 1855-1858. Synopsis des échinides fossiles. Reinwald , Paris, lxviii+490 pp., 44 pls.