AaadontaAaadonta angauranaAaadonta constrictaAaadonta fuscozonataAaadonta irregularisAaadonta kinlochiAaadonta pelewanaAbaloneAbbasitesAbdopusAbichitesAbida (gastropod)Abida secaleAbraliaAbraliopsisAbraliopsis morisiiAbrytasitesAbyssochrysidaeAbyssochrysoideaAcanthaecitesAcanthinaAcanthina spirataAcanthinitesAcanthinucella punctulataAcanthinulaAcanthinula aculeataAcanthinula spiniferaAcanthoceras (ammonite)AcanthoceratidaeAcanthochitonaAcanthochitona thileniusiAcanthochitona zelandicaAcanthochitonidaeAcanthodiscusAcanthodorisAcanthodoris hudsoniAcanthodoris luteaAcanthodoris nanaimoensisAcanthodoris pilosaAcanthodoris planca