Size classes of giant Parapuzosia (P.) over the Tepeyac and Chalk sections.
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posted on 2021-11-10, 18:24 authored by Christina Ifrim, Wolfgang Stinnesbeck, Arturo H. González González, Nils Schorndorf, Andrew S. GaleSize refers to the diameter of the phragmocone (DP), i.e. diameter at the last suture; the indivdual shells were originally 1.5x larger. Magenta: P. (P.) leptophlla. Dark-red: P. (P.) seppenradensis. See Fig 3 for legend.
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small geographic areascaused ecological pressureanalysis provides insightanalysed regarding morphometryworld ever sincediv >< pgradual evolutionary increaselate cretaceous cephalopodsdiameter near seppenrade1895 ), fascinatedmiddle early campanianlarge (< 1also reached diametersworld ’p cretaceous seaslower campanianearliest campaniancoeval increaselate santonianearly santoniansize increasetop predatorssubsequent findingsstratigraphic informationshell diametersseppenradensis precise crosspotential ancestorparapuzosia palaeogeographic distributionleptophylla latter grewlargest ammonitegrowth stagesgigantism exceedsgiant cephalopodgeneral trendfirst appearsexceedingly rareadult shells74 metres
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