1921 yılında tanımlanan türler

1921 yılında tanımlanan birçok tür bulunmakta.

## Hayvanlar
**[[Aborichthys elongatus]]*
**[[Akodon sylvanus]]*
**[[Alosa macedonica]]*
**[[Epipedobates anthonyi]]*
**[[Aphyosemion australe]]*
**[[Thylamys sponsorius]]*
**[[Oxymycterus akodontius]]*
**[[Arthroleptis lameerei]]*
**[[Puffinus mauretanicus]]*
**[[Crocidura nigripes]]*
**[[Blaniulus lichtensteini]]*
**[[Blaniulus lorifer]]*
**[[Blaniulus orientalis]]*
**[[Ara glaucogularis]]*
**[[Rattus bontanus]]*
**[[Brachyophidium rhodogaster]]*
**[[Brissopsis zealandiae]]*
**[[Capito brunneipectus]]*
**[[Cadlina sparsa]]*
**[[Echiothrix centrosa]]*
**[[Centrostephanus rubricingulus]]*
**[[Cerithiopsina signa]]*
**[[Akodon toba]]*
**[[Strix chacoensis]]*
**[[Thamnophilus zarumae]]*
**[[Cheiracanthium africanum]]*
**[[Cheiracanthium macedonicum]]*
**[[Nonnula amaurocephala]]*
**[[Dendrelaphis cyanochloris]]*
**[[Tarsius dentatus]]*
**[[Lophotriccus vitiosus]]*
**[[Mastomys pernanus]]*
**[[Eudendrium antarcticum]]*
**[[Fromia elegans]]*
**[[Grammostola pulchra]]*
**[[Caenolestes caniventer]]*
**[[Handleyomys intectus]]*
**[[Pseudomys oralis]]*
**[[Bunomys penitus]]*
**[[Ituri batis]]*
**[[Rana johnsi]]*
**[[Eothenomys cachinus]]*
**[[Karamoja apalis]]*
**[[Knipowitschia thessala]]*
**[[Cheiromeles parvidens]]*
**[[Melomys talaudium]]*
**[[Scombrolabrax heterolepis]]*
**[[Mangelia pulchrior]]*
**[[Chaetodon marleyi]]*
**[[Mebeli michaelseni]]*
**[[Mitromorpha hewitti]]*
**[[Neusticomys monticolus]]*
**[[Peltops montanus]]*
**[[Northiella narethae]]*
**[[Notomys aquilo]]*
**[[Eudyptes moseleyi]]*
**[[Odhneria odhneri]]*
**[[Oecomys rutilus]]*
**[[Rattus marmosurus]]*
**[[Maxomys panglima]]*
**[[Microtus irani]]*
**[[Abrocoma vaccarum]]*
**[[Tarsius pumilus]]*
**[[Raja texana]]*
**[[Geokichla joiceyi]]*
**[[Scymnodalatias sherwoodi]]*
**[[Hipposideros curtus]]*
**[[Melomys caurinus]]*
**[[Abrocoma shistacea]]*
**[[Coenocorypha iredalei]]*
**[[Rhipidomys austrinus]]*
**[[Idiotropiscis australe]]*
**[[Sulawesi forest rat|Taeromys punicans]]*
**[[Sulawesi giant rat|Paruromys dominator]]*
**[[Sulawesi montane rat|Taeromys hamatus]]*
**[[Sulawesi soft-furred rat|Eropeplus canus]]*
**[[Sulawesi woodcock|Scolopax celebensis]]*
**[[Sulawesian shrew rat|Melasmothrix naso]]*
**[[Sumatran water shrew|Chimarrogale sumatrana]]*
**[[Triops newberryi]]*
**[[Tweedy's crab-eating rat|Ichthyomys tweedii]]*
**[[Western Saharan spiny mouse|Acomys airensis]]*
**[[White-browed tit-spinetail|Leptasthenura xenothorax]]*
**[[Zodarion pirini]]*

### Böcekler
**[[Acarapis woodi]]*
**[[Acatochaeta africana]]*
**[[Aciagrion hisopa]]*
**[[Acraea alciopoides]]*
**[[Acraea eltringhami]]*
**[[Alaena madibirensis]]*
**[[Aloeides griseus]]*
**[[Anthene bipuncta]]*
**[[Anthene discimacula]]*
**[[Anthene madibirensis]]*
**[[Aphnaeus affinis]]*
**[[Aphrissa fluminensis]]*
**[[Ariadne albifascia]]*
**[[Ariadne personata]]*
**[[Azteca cordincola]]*
**[[Bebearia laetitioides]]*
**[[Bicyclus persimilis]]*
**[[Bicyclus suffusa]]*
**[[Byasa laos]]*
**[[Celaenorrhinus kivuensis]]*
**[[Cephetola viridana]]*
**[[Ceranthia tenuipalpis]]*
**[[Ceratrichia semlikensis]]*
**[[Ceromya flaviseta]]*
**[[Cigaritis cynica]]*
**[[Citrinophila terias]]*
**[[Crematogaster armandi]]*
**[[Cupidesthes cuprifascia]]*
**[[Cupidesthes minor]]*
**[[Dalla bubobon]]*
**[[Dolichoderus luederwaldti]]*
**[[Dorymyrmex morenoi]]*
**[[Empusa uvarovi]]*
**[[Entomophaga nigrohalterata]]*
**[[Epiophlebia laidlawi]]*
**[[Eresina toroensis]]*
**[[Eretis herewardi]]*
**[[Eriozancla trachyphaea]]*
**[[Euphaedra nigrobasalis]]*
**[[Euphaedra phosphor]]*
**[[Euptera semirufa]]*
**[[Franklin's bumblebee|Bombus franklini]]*
**[[Greenidea ficicola]]*
**[[Harpendyreus kisaba]]*
**[[Hewitsonia congoensis]]*
**[[Hipparchia neapolitana]]*
**[[Iolaus frater]]*
**[[Iolaus iturensis]]*
**[[Liometopum sinense]]*
**[[Megachile bispinosa]]*
**[[Megachile ciliatipes]]*
**[[Megachile haematogastra]]*
**[[Megachile latericauda]]*
**[[Megachile mundifica]]*
**[[Megachile semipleta]]*
**[[Megachile simplicipes]]*
**[[Mimeresia neavei]]*
**[[Neptis poultoni]]*
**[[Neptis rogersi]]*
**[[Neptis rothschildi]]*
**[[Nyctocyrmata crotalopis]]*
**[[Ochetellus sororis]]*
**[[Pilodeudorix canescens]]*
**[[Pilodeudorix kohli]]*
**[[Platylesches affinissima]]*
**[[Proischnura rotundipennis]]*
**[[Ptelina subhyalina]]*
**[[Sarangesa pandaensis]]*
**[[Sphegina montana]]*
**[[Stempfferia iturina]]*
**[[Strongylognathus kervillei]]*
**[[Sympetrum navasi]]*
**[[Telipna hollandi]]*
**[[Telipna plagiata]]*

#### Kın kanatlılar
**[[Acanthoderes latevittatus]]*
**[[Amblesthidopsis areolata]]*
**[[Anthia babaulti]]*
**[[Atyphella atra]]*
**[[Boppeus fairmairei]]*
**[[Calathus amplior]]*
**[[Capitocrassus castaneus]]*
**[[Copelatus brasiliensis]]*
**[[Copelatus instriatus]]*
**[[Cymindis kricheldorffi]]*
**[[Enaretta conifera]]*
**[[Exalphus biannulatus]]*
**[[Frea grisescens]]*
**[[Hestimoides striolatus]]*
**[[Mecodema punctellum]]*
**[[Mordella bribiensis]]*
**[[Mordella longicauda]]*
**[[Mordella moscovia]]*
**[[Mordella moscoviensis]]*
**[[Mordella pragensis]]*
**[[Mordella pubescens]]*
**[[Mordellistena incommunis]]*
**[[Mordellistena quadrinotata]]*
**[[Mordellistena syntaenia]]*
**[[Musius crassicornis]]*
**[[Paradoliops humerosa]]*
**[[Penaherreraus bilineatus]]*
**[[Sagridola luteicornis]]*
**[[Stenomorda notoensis]]*
**[[Suphisellus hieroglyphicus]]*
**[[Suphisellus rufulus]]*
**[[Suphisellus similis]]*
**[[Suphisellus variicollis]]*

## Mantar
**[[Gonidiomyces sociabilis]]*
**[[Kabatiella lini]]*
**[[Nothocastoreum cretaceum]]*
**[[Ophionectria portoricensis]]*
**[[Pleosphaerulina sojicola]]*
**[[Staheliomyces cinctus]]*

## Bitkiler
**[[Aa macra]]*
**[[Aa riobambae]]*
**[[Aa rosei]]*
**[[Allium monticola]]*
**[[Alloschmidia glabrata]]*
**[[Berberis argentinensis]]*
**[[Berberis lambertii]]*
**[[Clinosperma bractealis]]*
**[[Eucephalus vialis]]*
**[[Froelichiella grisea]]*
**[[Greigia berteroi]]*
**[[Herminium calceoliforme]]*
**[[Hieracium robinsonii]]*
**[[Persoonia adenantha]]*
**[[Persoonia stradbrokensis]]*
**[[Polygonum albanicum]]*
**[[Pritchardia affinis]]*
**[[Quercus austrocochinchinensis]]*
**[[Quercus chevalieri]]*
**[[Quercus urbanii]]*
**[[Rubus arcuans]]*
**[[Sporobolus caroli]]*
**[[Symphoricarpos × chenaultii]]*
**[[Veratrum insolitum]]*