Table 9 in Morphometric analysis of Eocene nummulitids in western and central Cuba: taxonomy, biostratigraphy and evolutionary trends

Table 9. Characters and attributes (means and standard deviations, SD, in mm) for Operculinoides soldadensis and comparisons with Nummulites striatoreticulatus, Palaeonummulites trinitatensis, Operculinoides floridensis (tightly coiled) and O. floridensis (loosely coiled). Symbol key: ++, strong positive differences with <1% error probability; 0, no significant differences; ――, strong negative differences with <1% error probability. O. soldadensisMeanSDO. floridensis (tightly coiled)O. floridensis (loosely coiled)P. trinitatensisN. striatoreticulatusFirst chamber length252.092.62――――0――Proloculus nominal diameter92.229.93――――0――Deuteroloculus ratio1.1910.183400+++Initial marginal radius116.944.90――――0――Marginal radius increase0.1330.0193++0++++Spiral chamber height increase2.00.96――00――Initial spiral chamber height38.515.47――――0――Backbend angle0.6870.1008++0++++Initial chamber length129.143.24――――0――Chamber length increase0.0600.0202++0++++Perimeter ratio1.4480.0809++0++++