Palaeomath 101 n1-3 trilobite data Acaste 5.1 3.46 Balizoma 4.6 6.53 Calymene 12.98 14.15 Ceraurus 7.9 5.32 Cheirurus 12.83 12.96 Cybantyx 16.41 13.08 Cybeloides 6.6 6.84 Dalmanites 10. 9.12 Delphion 8.08 10.77 Narroia 15.67 9.25 Ormathops 4.53 4.11 Phacopdina 6.44 6.94 Pricyclopyge 21.53 14.64 Ptychoparia 12.82 9.36 Rhenops 22.27 17.56 Sphaerexochus 4.93 6.21 Trimerus 16.35 15.02 Zachanthoides 13.41 8.51