Dodatak:Popis mekušaca, Am
Ama
uredi- Amaea
- Amalda
- Amanda
- Amarilladesma
- Amathina
- Amathinidae
- Amauropsis
Amb
uredi- Amblema elliottii (Lea 1856)
- Amblema neislerii (Lea 1858)
- Amblema plicata (Say 1817)
Mollusca → Bivalvia → Unionoida → Unionoidea → Unionidae
- Amblychilepas
- Amboherpia
- Amborhytida
- Ambuscintilla
Ame
uredi- Amecanauta
- Ameghinomya
- Ameloctopus
- Ameranna
- Amerianna
- Americardia
- Americominella
- Amerycina
Ami
uredi- Amiantis
- Amiantofusus
- Amicula
- Amimopina
Amm
uredi- Ammonicera
Amn
uredi- Amnicola
- Amnicolidae
Amo
uredi- Amoria
Amp
uredi- Amphibola
- Amphibolidae
- Amphiboloidea
- Amphichama
- Amphidromus
- Amphigyra
- Amphilepida
- Amphimenia
- Amphimeniidae
- Amphioctopus
- Amphiplica
- Amphirissoa
- Amphissa
- Amphithalamus
- Amphitretidae
- Amphitretus
- Amplirhagada
- Ampulla
- Ampullaria
- Ampullariidae
- Ampullarioidea
- Ampullinidae
- Ampullosansonia
Amu
uredi- Amuraplexa
- Amuropaludina
- Amusium
Amy
uredi- Amygdalum