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  • noun

Synonyms for Belemnoidea

order of extinct dibranchiate cephalopods related to the surviving spirulas

References in periodicals archive ?
The number and distribution of other fossils (primarily belemnoids and bivalves) were also similar between the two varieties of rock.
Research projects might also focus on fossils other than the ammonoids, including the orientation of the belemnoids (multiple specimens on single tiles appear, upon preliminary analysis, to be oriented in a similar direction and not randomly, suggesting post mortem modification and alignment by water currents) or an analysis of the ratio of the ammonoids to the belemnoids between the limestones.