Durham, J. W. 1961a. Miocene echinoids from the Valle Central, Costa Rica. Journal of Paleontology 35, 480-488.
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Durham, J. W.
1961
Miocene echinoids from the Valle Central, Costa Rica
Journal of Paleontology
35: 480-488
Publication
from Kier & Lawson (1978)
Echinolampas woodringi n. sp., Pericosmus israelskyi n. sp., Schizaster costaricensis n. sp., Schizobrissus kewi n. sp., Plagiobrissus costaricensis n. sp., and P. malavassii n. sp, are described. Brissopsis, n. sp., and Clypeaster sp. indet. are recorded