The Echinoid Directory

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Astrodapsis arnoldi Pack, 1909, p. 279

Diagnostic Features	A species of Astrodapsis with: Petals moderately raised with distinct longitudinal shoulders flanking the ambulacra; Moderate to deep interambulacral valleys; Periproct inframarginal; Margins moderately thick.
Distribution	Upper Miocene to Lower Pliocene, California, U.S.A.
Type	Holotype: University of Berkeley Museum of Paleontology 11030
Classification and/or Status	A species of Astrodapsis
Remarks	Hall, C. A. 1962. Evolution of the echinoid genus Astrodapsis. University of California Publications in Geological Sciences 40(2), 47-180, 44 pls.