The Echinoid Directory

Family Acrolusiidae Mintz, 1968, p. 1278


 Stem group atelostomates with:

  • disjunct apical disc, the posterior oculars separated by only a small distance from the remainder of the disc by plates of interambulacra 1 and 4 meeting along the aboral midline
  • ocular plates II and IV small and widely separated by genital plate 2
  • posterior oculars far removed from the periproct
  • all ambulacra similar; petaloid.
Lower Cretaceous (Valanginian), North Africa.
Mintz, L. W. 1968. Echinoids of the Mesozoic families Collyritidae d'Orbigny, 1853 and Disasteridae Gras, 1848. Journal of Paleontology 42, 1272-1288.