Caprella acanthifera acanthifera Leach, 1814 represented as Caprella acanthifera Leach, 1814 (basis of record)
Caprella acanthifera discrepans Mayer, 1890 (basis of record)
Caprella aequilibra Say, 1818 accepted as Caprella equilibra Say, 1818 (additional source)
Caprella dentata Haller, 1880 accepted as Caprella liparotensis Haller, 1879 (source of synonymy)
Caprella dentata Haller, 1880 accepted as Caprella liparotensis Haller, 1879 (basis of record)
Caprella esmarckii Boeck, 1861 accepted as Caprella equilibra Say, 1818 (source of synonymy)
Caprella hystrix Krøyer, 1843 accepted as Caprella acanthifera Leach, 1814 (source of synonymy)
Caprella loveni Boeck, 1871 accepted as Caprella septentrionalis Krøyer, 1838 (source of synonymy)
Caprella monocera G.O. Sars, 1894 accepted as Caprella septentrionalis Krøyer, 1838 (source of synonymy)
Caprella punctata Boeck, 1861 accepted as Caprella septentrionalis Krøyer, 1838 (basis of record)
Caprella punctata Boeck, 1861 accepted as Caprella septentrionalis Krøyer, 1838 (source of synonymy)
Protella phasma (Montagu, 1804) accepted as Pseudoprotella phasma (Montagu, 1804) (source of synonymy)
Protella phasma (Montagu, 1804) accepted as Pseudoprotella phasma (Montagu, 1804) (basis of record)
Proto Leach, 1814 accepted as Phtisica Slabber, 1769 (source of synonymy)
Proto pedata Leach, 1814 accepted as Phtisica marina Slabber, 1769 (source of synonymy)
Proto ventricosa (Müller, 1776) accepted as Phtisica marina Slabber, 1769 (basis of record)