Gonyaulacaleans with a
tabulation which accords with, or derives from, a pattern in which there are two or three
fundital plates - always the
posterior intercalary homologue (*1p) and the first
antapical homologue (*1''''), and sometimes also the
posterior sulcal homologue (*ps). The first
antapical homologue (*1'''') is the
dorsalmost of the
fundital plates, is five-sided (quinqueform) and does not contact the
distalmost
postcingular plate(s) - i.e. the sixth
postcingular homologue (*6''') - and, when it is outside the
sulcus, the
right sulcal homologue (*rs). There are typically five or fewer
climactal plates.
Secondary plate overgrowth occurs only at overlapping
plate margins.
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