Acanthosphaera tenuissima – synonym of Acanthosphaera actinota
Acanthostomella norvegica lata
Acanthostomella norvegica typica
Actinomma boreale – synonym of Cromyechinus antarctica
Aegyria oliva – synonym of Aegyriana oliva
Amphisia crassa – synonym of Trichototaxis crassa
Amphisia diademata – synonym of Holosticha diademata
Amphitholus spp. – synonym of Cubotholus spp.
Amphorella (?) antarctica – synonym of Cymatocylis antarctica
Amphorella amphora – synonym of Amphorides amphora
Amphorella brandti – synonym of Amphorides amphora
Amphorella calida – synonym of Amphorides calida
Amphorella ganymedes – synonym of Dadayiella ganymedes
Amphorella ganymedes var. bulbosa – synonym of Dadayiella ganymedes
Amphorella ganymedes var. tenuicauda, forma acuta – synonym of Dadayiella ganymedes
Amphorella ganymedes var. tenuicauda, forma obtusa – synonym of Dadayiella ganymedes
Amphorella ganymedes, forma acuta – synonym of Dadayiella ganymedes
Amphorella laackmanni – synonym of Amphorides laackmanni
Amphorella quadrilineata – synonym of Amphorides quadrilineata
Amphorella quadrilineata var. brandti – synonym of Amphorides amphora
Amphorella Steenstrupii – synonym of Steenstrupiella steenstrupii
Amphorella urceolata – synonym of Ascampbelliella urceolata
Amphorellopsis acantharus – synonym of Ormosella acantharus
Amphorellopsis laevis – synonym of Amphorellopsis quinquealata
Androspyris ramosa – synonym of Tholospyris ramosa
Anomalocranchia impennis – synonym of Teuthowenia pellucida
Aulacantha scolymantha bathybia
Aulacantha scolymantha scolymantha
Auloceros arborescens birameus
Auloceros arborescens dichodendrum
Auloceros arborescens irregularis
Auloceros arborescens subelegans
Auloceros arborescens trigeminus
Aulospathis variabilis aulodendroides
Aulospathis variabilis bifurca