Dodatak:Popis mahovnjaka, A
Ab uredi
Aberrodomus Gordon, 1988 uredi
- Aberrodomus candidus Gordon, 1988 tipična vrsta
- Aberrodomus pocillifer (Harmer, 1957)
- Aberrodomus sinuatus (Harmer, 1957)
Bryozoa → Gymnolaemata → Cheilostomatida → Bifaxarioidea → Bifaxariidae
Ac uredi
- Acanthodesia
- Acanthodesiomorpha
- Acanthophragma
- Acorania
- Acoraniidae
- Actinopora
- Actinoporidae
- Actisecidae
- Actisecos
Ad uredi
- Adelascopora
- Adenifera
- Adeona
- Adeonella
- Adeonellidae
- Adeonellopsis
- Adeonidae
- Adeonoidea
Ae uredi
- Aequilumina
- Aetea
- Aeteidae
- Aeteoidea
- Aethozoon
- Aethozoontidae
- Aeverrillia
- Aeverrilliidae
Af uredi
- Afrindella
Ai uredi
- Aimulosia
- Aisenvergiidae
Ak uredi
- Akatopora
- Akatoporidae
Al uredi
- Alcyonidiidae
- Alcyonidioides
- Alcyonidium
- Alderina
- Alismittina
- Allantocallopora
- Allantopora
- Allerescha
- Allorhynchozoon
†Alwynopora Taylor & Curry, 1985 uredi
- †Alwynopora orodamnus Taylor & Curry, 1985
Bryozoa → Stenolaemata → Phylloporinida → Enalloporidae
- Alysidiidae
- Alysidium
Am uredi
- Amastigia
- Amathia
- Ammatophora
- Amphibiobeania
- Amphiblestrum
- Amplexicamera
- Amplexoporidae
An uredi
- Anaphragma
- Anarthropora
- Anaskopora
- Anchicleidochasma
- Andreella
- Anexechona
- Anguinella
Anguisia Jullien, 1883 uredi
- Anguisia jullieni Neviani, 1895
- Anguisia jullieni Ostrovsky, 1998
- Anguisia verrucosa Jullien, 1883 tipična vrsta
Bryozoa → Stenolaemata → Cyclostomata → Oncousoeciidae
- Annectocyma
- Annectocymidae
- Anolotichiidae
- Anoteropora
- Antarcticaetos
- Antarctothoa
- Antropora
- Antroporidae
Ao uredi
†Aostipora Vinassa de Regny, 1921 uredi
- †Aostipora cystata (Bassler, 1911)
- †Aostipora kuckersiana (Bassler, 1911)
Bryozoa → Stenolaemata → Trepostomata → Monticuliporidae → Trematoporinae
Ap uredi
- Apiophragma
- Aplousina
- Apsendesia
- Aptonella
Aq uredi
- Aquiloniella
Ar uredi
- Arachnidiidae
- Arachnidium
- Arachnoidea
- Arachnoidella
- Arachnopusia
- Arachnopusiidae
- Arachnopusioidea
Araxopora Morozova 1965 uredi
- †Araxopora affinispinata Xia 1985
- †Araxopora araxensis Nikiforova 1933
- †Araxopora bifoliata Morozova 1965
- †Araxopora chinensis Girty 1907
- †Araxopora fistulata Li 1977
- †Araxopora granularis Yang 1958
- †Araxopora hayasakai Yabe and Sugiyama 1942
- †Araxopora hubeiensis Li 1977
- †Araxopora ikedai Sakagami 1998
- †Araxopora jiangxiensis Li 1985
- †Araxopora lunanensis Xia 1985
- †Araxopora macrocava Morozova 1965
- †Araxopora malayensis Sakagami 1973
- †Araxopora minor Li 1977
- †Araxopora spinata Morozova 1965
- †Araxopora varians Yang 1958
Animalia → Bryozoa → Stenolaemata → Trepostomatida → Araxoporidae
Porodica †Araxoporidae Morozova 1970 uredi
- Rodovi: Araxopora, Paralioclema, Permolioclema, Ruzhencevia, Styloclema
Animalia → Bryozoa → Stenolaemata → Trepostomatida
- Arbocuspis
- Arbopercula
- Arctonula
- Arthropoma
As uredi
- Asajirella
- Ascorhiza
- Ascosia
- Ascosiidae
- Aspericreta
- Aspidelectra
- Aspidostoma
- Aspidostomatidae
- Aspiscellaria
Astochoporella Hayward & Thorpe, 1988 uredi
- Astochoporella cassidula Hayward & Thorpe, 1988
Bryozoa → Gymnolaemata → Cheilostomatida → Flustrina → Lepralielloidea → Umbonulidae
Astoleiosalpinx d'Hondt & Gordon, 1996 uredi
- Astoleiosalpinx pedunculata d'Hondt & Gordon, 1996
Bryozoa → Gymnolaemata → Cheilostomatida → Flustrina → Scruparioidea → Leiosalpingidae
At uredi
- Atelestozoum
- Attinopora
Au uredi
- Aulopocella
- Australella
- Austroflustra
- Austrothoa
Av uredi
- Avenella