Be careful not to confuse the scientific name Belemnites of this genus with the common name of the cephalopods included in the extinct order Belemnitida (commonly referred to as "Belemnites").
(MENAFN Editorial) iCrowdNewswire - Jul 18, 2017 How does δ18O and δ13C fluctuate in Early Jurassic ? Investigations of belemnites from South Germany give the answerAb... .
Here we present to our knowledge the first organic carbon isotope record derived from the organic matrix in the calcite rostra of early Toarcian belemnites ... We infer that belemnites adapted to environmental change by shifting their habitat from cold bottom waters to warm surface waters in response to expanded seafloor anoxia.