bradyina bradyina bradyina is an extinct genus of fusulinid belonging to the family bradyinidae. specimens of the genus have been found in carboniferous to permian beds in europe, asia, and north america. the genus has been used as an index fossil in china. bradyinatemporal range: scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: retaria infraphylum: foraminifera class: †fusulinata family: †bradyinidae genus: †bradyina species b. cribrostomata rauser-chernousova and reitlinger 1937