heterohelix heterohelix heterohelix is an extinct genus of foraminifera belonging to the family heterohelicidae of the superfamily heterohelicoidea and the suborder globigerinina. its type species is heterohelix americana (formerly textilaria americana). heterohelixtemporal range: santonian - late paleocene scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: retaria infraphylum: foraminifera class: globothalamea order: rotaliida suborder: globigerinina superfamily: heterohelicoidea family: heterohelicidae subfamily: †heterohelicinae genus: †heterohelixehrenberg, 1843 species see text species species in heterohelix include: heterohelix americana heterohelix budugensis heterohelix buliminiformis heterohelix bulloides heterohelix calabarflanki heterohelix carinata heterohelix concinna heterohelix cornuta heterohelix digitata heterohelix elongata heterohelix gradata heterohelix hohenemsensis heterohelix ilkhidagensis heterohelix irregularis heterohelix labellosa heterohelix oculis heterohelix perquadrata heterohelix praeelongata heterohelix praegradata heterohelix praeirregularis heterohelix pseudocarseyae heterohelix pseudoreussi heterohelix robusta heterohelix sphenoides heterohelix stenopos heterohelix suwalkensis heterohelix trochospiralis heterohelix varsoviensis heterohelix vistulaensis subgenus heterohelix (heterohelix) heterohelix (heterohelix) planeobtusa