Image for the group Thecosomata
Thecosomata [order]
Euthecosomata [suborder]
Cavolinioidea [superfamily]
Cavoliniidae [family]
Cavolinia [genus]
Cavolinia tridentata [species]
Limacinoidea [superfamily]
Limacinidae [family]
Limacina [genus]
Limacina helicina [species]
Pseudothecosomata [suborder]
