Image for the group Pteropoda
Pteropoda [order]
Gymnosomata [order]
Clionoidea [superfamily]
Cliopsidae [family]
Cliopsis [genus]
Cliopsis krohnii [species]
Notobranchaeidae [family]
Pneumodermatidae [family]
Thecosomata [order]
Euthecosomata [suborder]
Cavolinioidea [superfamily]
Cavoliniidae [family]
Cavolinia [genus]
Cavolinia tridentata [species]
Limacinoidea [superfamily]
Limacinidae [family]
Limacina [genus]
Limacina helicina [species]
Pseudothecosomata [suborder]
