Abra (semeles)

Abraliopsis (squids)

Abranda (tellins)

Acanthochitona (chitons)

Acanthodoris (sea-slugs)

Acesta (file-shells)

Aclis (aclidids)

Aclophoropsis (sinistral-creepers)

Acremodontina (ataphrids)

Acrosterigma (cockles)

Acteon (acteons)

Adamnestia (peanut-shells)

Adelphotectonica (sundial-shells)

Aegires (sea-slugs)

Aeolidiella (sea-slugs)

Aesopus (dove-shells)

Afrolittorina (australwinks)

Agnewia (rock-shells)

Alaba (alabas)

Alaginella (margin-shells)

Alcyna (top-shells)

Alloiodoris (sea-lemons)

Alvania (rice-shells)

Amalda (olives)

Amathina (amathinas)

Amblychilepas (keyhole-limpets)

Amoria (volutes)

Amphithalamus (false rice-shells)

Amphitretus (octopuses)

Amygdalum (pearly-mussels)

Anabathron (false rice-shells)

Anachis (dove-shells)

Anadara (ark-shells)

Anapella (triangles)

Anatoma (slit-shells)

Anatrophon (trophons)

Anisodonta (anisodontas)

Anomia (jingle-shells)

Antiguraleus (false-turrids)

Antisabia (bonnet-limpets)

Aphelodoris (sea-lemons)

Apicalia (seastar-snails)

Apixystus (trophons)

Aplysia (sea-hares)

Archidoris (sea-lemons)

Archiminolia (top-shells)

Architeuthis (squids)

Argalista (argalistas)

Argobuccinum (tritons)

Argonauta (paper-nautiluses)

Armina (sea-slugs)

Arthritica (leptons)

Ascobulla (bubble-shells)

Ascorhis (hydrobias)

Asperdaphne (false-turrids)

Astele (top-shells)

Asteracmea (limpets)

Astralium (star-shells)

Atagema (sea-lemons)

Ataxocerithium (false-creepers)

Atrina (pen-shells)

Attenuata (rice-shells)

Austraeolis (sea-slugs)

Austrocardiella (condyl-clams)

Austrocarina (turrids)

Austrocochlea (top-shells)

Austrocylichna (peanut-shells)

Austrodrillia (turrids)

Austroginella (margin-shells)

Austroharpa (harp-shells)

Austroliotia (liotias)

Austrolittorina (australwinks)

Austromitra (ribbed-mitres)

Austromytilus (beaked-mussels)

Austropusilla (turrids)

Austrorissopsis (aclidids)

Awanuia (aclidids)