The Echinoid Directory

Family Brissopsidae Lambert, 1905, p. 41


 Micrasterine spatangoids with:

  • apical disc ethmolytic with four gonopores;
  • petals sunken, relatively short;
  • anterior ambulacrum sunken, with differentiated pore-pairs associated with funnel-building tube-feet;
  • labral plate short and mushroom-shaped;
  • episternal plates trapezoidal, tapered to posterior and indented by ambulacral plate 6;
  • peripetalous and bilobed subanal fascioles present
  • aboral tubercles fine, uniform and dense; no primary tubercles.
Eocene to Recent; Atlantic, Indo-Pacific.