Table 2 in Morphometric analysis of Eocene nummulitids in western and central Cuba: taxonomy, biostratigraphy and evolutionary trends

Table 2. Characters and attributes (means and standard deviations, SD, in mm) for Nummulites and comparisons with Palaeonummulites and Operculinoides. Symbol key: ++, strong positive differences with <1% error probability; +, differences with <5% error probability; 0, no significant differences; ――, strong negative differences with <1% error probability. NummulitesMeanSDOperculinoidesPalaeonummulitesFirst chamber length448.7220.500++Proloculus nominal diameter334.2152.84++++Deuteroloculus ratio0.9990.1297――0Initial marginal radius355.9143.51++++Marginal radius increase0.0620.0081――0Spiral chamber height increase3.81.47++++Initial spiral chamber height111.058.49++++Backbend angle0.1640.0513――+Initial chamber length246.6125.210++Chamber length increase0.0090.0065――0Perimeter ratio1.1010.0595――0