Mintz, L. W. (1968). Echinoids of the Mesozoic families Collyritidae d'Orbigny, 1853 and Disasteridae Gras, 1848. Journal of Paleontology. 42: 1272-1288.
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Mintz, L. W.
1968
Echinoids of the Mesozoic families Collyritidae d'Orbigny, 1853 and Disasteridae Gras, 1848
Journal of Paleontology
42: 1272-1288
Publication
from Kier & Lawson (1978)
Disasteroid echinoids are members of the superorder Atelostomata characterized by a disjunct apical system. Recent studies have demonstrated that primitive disasteroids are endocyclic and that the transition to exocyclic forms can be traced in several lin