The Echinoid Directory

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Allocentrotus fragilis (Jackson, 1912); Recent, West coast of North America, no locality details. Apical view. From T. Mortensen 1943. A monograph of the Echinoidea Part III, 3. Camarodonta II. C. A. Reitzel, Copenhagen, pl. 30, fig. 11.

Diameter of test ca. 60 mm.