Table 4 in Morphometric analysis of Eocene nummulitids in western and central Cuba: taxonomy, biostratigraphy and evolutionary trends

Table 4. Characters and attributes (means and standard deviations, SD, in mm) for Palaeoummulites and comparisons with Nummulites and Operculinoides. Symbol key: +, differences with <5% error probability; 0, no significant differences; –, strong negative differences with <1% error probability. PalaeonummulitesMeanSDOperculinoidesNummulitesFirst chamber length243.338.59――――Proloculus nominal diameter113.025.840――Deuteroloculus ratio0.8880.1258――0Initial marginal radius140.128.760――Marginal radius increase0.0940.019500Spiral chamber height increase1.70.07――――Initial spiral chamber height46.510.020――Backbend angle0.4950.13200+Initial chamber length139.017.17――――Chamber length increase0.0280.017500Perimeter ratio1.2770.107600