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Bearing spines: spinose gastropods.

[Latin spīnōsus, from spīna, thorn.]

spi·nos′i·ty (-nŏs′ĭ-tē) n.
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The results suggested that prey with less expressed ornamentation were preferred ahead of highly spinose prey, and Stone therefore concluded that the primary effect of more pronounced spinosity was that of preventing direct access to the shell of the bivalve.