About 23% of all families, 48% of all genera (20% of marine families and 55% of marine genera) and 70% to 75% of all species became extinct.
Extinguíronse un 23% das familias, o 48% dos xéneros (20% das familias mariñas e 55% dos xéneros mariños) e do 70% ao 75% de todas as especies.