Idalia aspersa – synonym of Okenia quadricornis
Idalia inaequalis – synonym of Okenia quadricornis
Idalia leachii – synonym of Okenia leachii
Idasola simpsoni – synonym of Idas simpsoni
Ischnochiton marginatus var. adumbrata – synonym of Lepidochitona cinerea
Ischnochiton marginatus var. albocarinata – synonym of Lepidochitona cinerea
Ischnochiton marginatus var. miniata – synonym of Lepidochitona cinerea
Ischnochiton marginatus var. nigrescens – synonym of Lepidochitona cinerea
Ischnochiton marginatus var. rubrocarinata – synonym of Lepidochitona cinerea
Ischnochiton marginatus var. straminea – synonym of Lepidochitona cinerea