Heterosoma Mast 1910 (radiolarian)
Radiolaria - Entactinaria - Hexalonchidae
PaleoDB taxon number: 85207
Parent taxon: Hexalonchidae according to P. De Wever et al. 2001
Sister taxa: Hexacontium, Hexalonche, Hollandosphaera, Nanina, Tetrapetalon
Subtaxa: none
Ecology: passively mobile planktonic omnivore