hastigerinella hastigerinella hastigerinella is a marine, unicellular genus of foraminiferan. its only species is hastigerinella digitata, which measures about 2 mm (0.079 in). hastigerinella scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: retaria infraphylum: foraminifera class: globothalamea order: globigerinida family: hastigerinidae genus: hastigerinellacushman, 1927 species: h. digitata binomial name hastigerinella digitata(rhumbler, 1911)