| Kabatiella caulivora | 7314, 9171 |
| Kabatiella zeae | 9664, 9804 |
| Kaistia soli | 106436T |
| Kallichroma tethys | 33109 |
| Kalmanozyma fusiformata | 10225T |
| Kalmusia scabrispora | 106237 |
| Kangiella chungangensis | 110728T |
| Kappamyces cf. laurelensis | 103824 |
| Kappamyces sp. | 103830 |
| Karstenella vernalis | 114649, 114650, 114651 |
| Kazachstania africana | 1671T, 10897, 10898, 10930 |
| Kazachstania aquatica | 105124 |
| Kazachstania barnettii | 10849T, 10850, 104067T, 104068 |
| Kazachstania bulderi | 113768T |
| Kazachstania exigua | 0271, 0956, 1128T, 1141, 1142, 1169, 1170, 11082, 105171 |
| Kazachstania gamospora | 11056T, 11057, 101825, 101826, 101827, 101828, 101829 |
| Kazachstania hellenica | 103634, 103635, 103636, 103637T |
| Kazachstania humatica | 10673T |
| Kazachstania jiainicus | 102655T |
| Kazachstania kunashirensis | 10915T |
| Kazachstania lodderae | 10605, 10606T |
| Kazachstania martiniae | 0254, 0752T, 1957 |
| Kazachstania naganishii | 10181T, 10922, 10923, 10924, 10944, 10945, 10956, 10957, 10958 |
| Kazachstania piceae | 10694T |
| Kazachstania rosinii | 10008T, 10009 |
| Kazachstania servazzii | 1838T, 10869, 10870, 104071, 109522 |
| Kazachstania siamensis | 101968T |
| Kazachstania sinensis | 10838T |
| Kazachstania solicola | 10867T, 104066T |
| Kazachstania spencerorum | 10851T, 10852 |
| Kazachstania telluris | 1017, 1329, 1330, 1331T, 1897 |
| Kazachstania transvaalensis | 1625T |
| Kazachstania turicensis | 10946T |
| Kazachstania unispora | 0215, 0264, 0298, 0316T, 0724, 1171, 1174, 11084, 110273 |
| Kazachstania viticola | 10866T, 104065 |
| Kazachstania yakushimaensis | 1889T, 10674, 10675, 10676, 10959, 10960, 10961, 10962, 101844 |
| Kazachstania zonata | 100503, 100504T, 101821, 101822, 101823, 101824 |
| Kernia nitida | 8200 |
| Kernia ovata | 8792 |
| Kernia pachypleura | 9864, 30413, 33037 |
| Kibdelosporangium aridum subsp. aridum | 14493T |
| Kibdelosporangium aridum subsp. largum | 15152T |
| Kibdelosporangium kanagawaense | 112388T |
| Kibdelosporangium philippinense | 15154T |
| Kibdelosporangium rhizosphaerae | 112389T |
| Kibdelosporangium rhizovicinum | 112390T |
| Kibdelosporangium sp. | 113523, 115492 |
| Kickxella alabastrina | 30215 |
| Kineococcus aurantiacus | 15268T |
| Kineococcus endophytica | 108674T |
| Kineococcus glutinatus | 111526T |
| Kineococcus gynurae | 103943T |
| Kineococcus mangrovi | 110933T |
| Kineococcus radiotolerans | 101839T |
| Kineococcus xinjiangensis | 107624T |
| Kineosphaera limosa | 100340T |
| Kineosphaera nakaumiensis | 109121T |
| Kineosporia aurantiaca | 14067T |
| Kineosporia babensis | 104154T |
| Kineosporia corallincola | 114885T |
| Kineosporia mikuniensis | 16234T |
| Kineosporia rhamnosa | 16231T |
| Kineosporia rhizophila | 16233T |
| Kineosporia sp. | 101676, 101677, 101731, 101732, 101733, 105344, 105839, 105843 |
| Kineosporia succinea | 16232T |
| Kionochaeta ramifera | 9947 |
| Kitasatospora aburaviensis | 12830T |
| Kitasatospora albolonga | 13465T |
| Kitasatospora arboriphila | 101834T |
| Kitasatospora atroaurantiaca | 14327T |
| Kitasatospora aureofaciens | 3187, 3305, 12843T, 13183, 14004 |
| Kitasatospora azatica | 13803T |
| Kitasatospora cineracea | 16452T |
| Kitasatospora cinereorecta | 15395T |
| Kitasatospora cochleata | 14768T |
| Kitasatospora cystarginea | 14836T |
| Kitasatospora gansuensis | 101835T |
| Kitasatospora griseola | 14371T |
| Kitasatospora herbaricolor | 12876T |
| Kitasatospora humi | 115116T |
| Kitasatospora indigofera | 3928, 12878T |
| Kitasatospora kifunensis | 15206T |
| Kitasatospora mediocidica | 14789T, 14838 |
| Kitasatospora misakiensis | 12891T |
| Kitasatospora niigatensis | 16453T |
| Kitasatospora nipponensis | 101836T |
| Kitasatospora paracochleata | 14769T |
| Kitasatospora paranensis | 101837T |
| Kitasatospora phosalacinea | 14362, 14372T, 14627 |
| Kitasatospora psammotica | 13971T |
| Kitasatospora purpeofusca | 12905T, 14457 |
| Kitasatospora putterlickiae | 100917T |
| Kitasatospora sampliensis | 102069T |
| Kitasatospora setae | 14216T |
| Kitasatospora sp. | 15121, 101165, 101166, 101167, 101168, 110746, 115033T, 116167 |
| Kitasatospora terrestris | 101838T |
| Kitasatospora xanthocidica | 13469T |
| Klebsiella aerogenes | 12010, 13534T |
| Klebsiella oxytoca | 102593T, 105695T |
| Klebsiella pneumoniae | 3318, 3319, 3321, 3512, 12009, 12019, 12059, 12932, 13277, 13541, 13703, 14438, 14439, 14440, 14441, 14442, 14443 |
| Klebsiella pneumoniae subsp. ozaenae | 105683T |
| Klebsiella pneumoniae subsp. pneumoniae | 14940T |
| Klebsiella pneumoniae subsp. rhinoscleromatis | 105682T |
| Klebsiella sp. | 100048, 100441, 109911 |
| Klebsiella variicola | 111937 |
| Klebsormidium sp. (class: Charophyceae) | 113325 |
| Kloeckera africana | 0868, 0869, 1155, 1340T |
| Kloeckera apiculata | 0154, 0175, 0178, 0865, 0866, 0867 |
| Kloeckera apis | 10831T |
| Kloeckera corticis | 0631T, 0633, 1097 |
| Kloeckera hatyaiensis | 104215T |
| Kloeckera japonica | 0151 |
| Kloeckera javanica | 0669, 1094T, 1095, 1096, 1248 |
| Kloeckera lindneri | 100749T |
| Kluyvera ascorbata | 102466T |
| Kluyvera cryocrescens | 102467T |
| Kluyvera intermedia | 102594T |
| Kluyvera sp. | 111940 |
| Kluyveromyces aestuarii | 10597T, 10952 |
| Kluyveromyces dobzhanskii | 10603T, 10604 |
| Kluyveromyces hubeiensis | 105125, 105126 |
| Kluyveromyces lactis var. drosophilarum | 1012 |
| Kluyveromyces lactis var. lactis | 0433, 0648, 1090T, 1267, 1673, 1903 |
| Kluyveromyces marxianus | 0219, 0260, 0272, 0273, 0277, 0288, 0482, 0483, 0541, 0617, 0690, 1735, 1777, 1963, 10005T, 10287, 104275, 105680 |
| Kluyveromyces nonfermentans | 10965, 10966T, 10967 |
| Kluyveromyces siamensis | 10598, 10949, 10950, 10951, 103859T |
| Kluyveromyces sp. | 11073, 11074, 11075, 11077, 11079 |
| Kluyveromyces wickerhamii | 1675T |
| Knoellia aerolata | 106306T |
| Knoellia koreensis | 114620T |
| Knoellia locipacati | 109775T |
| Knoellia sinensis | 100350T |
| Knoellia subterranea | 100351T |
| Knufia epidermidis | 113469, 113471 |
| Kobayasia nipponica | 9353, 30352, 112304 |
| Kockovaella fuzhouensis | 10205, 10374T |
| Kockovaella imperatae | 10522T |
| Kockovaella thailandica | 10520T, 10521 |
| Kocuria carniphila | 110786T |
| Kocuria coralli | 109942T |
| Kocuria flava | 107626T |
| Kocuria marina | 110801T, 113594 |
| Kocuria oceani | 113401 |
| Kocuria palustris | 15442, 16318T |
| Kocuria pelophila | 110990T |
| Kocuria polaris | 103063T |
| Kocuria rhizophila | 12708, 16319T, 103217 |
| Kocuria rosea | 3764, 3768T, 15344, 15588 |
| Kocuria salsicia | 109970T |
| Kocuria sp. | 3064, 114282 |
| Kocuria turfanensis | 107627T |
| Kocuria varians | 3765, 15358T, 15951, 15952, 15953, 15954, 15955, 114663 |
| Kodamaea anthophila | 105169 |
| Kodamaea fukazawae | 101266T |
| Kodamaea fungicola | 101264T |
| Kodamaea kakaduensis | 105127 |
| Kodamaea ohmeri | 0158, 0202, 1271T, 1374, 1482, 1483, 1484, 1485 |
| Kodamaea sagamina | 101265T |
| Kodamaea suecica | 10313T |
| Kodonospora tetracolumnaris | 111167T |
| Kohlmeyeriella crassa | 32133T, 32134 |
| Kohlmeyeriella tubulata | 32149, 32150 |
| Komagataeibacter diospyri | 113801, 113802T |
| Komagataeibacter europaeus | 3261, 115936 |
| Komagataeibacter hansenii | 14816, 14817, 14820T, 105051 |
| Komagataeibacter maltaceti | 14815T |
| Komagataeibacter medellinensis | 3288T |
| Komagataeibacter oboediens | 14822, 110705T, 115794 |
| Komagataeibacter xylinus | 13693, 13772, 13773, 15237T, 16643, 16644, 16670, 16672, 16682, 115795 |
| Komagataella pastoris | 1013, 10777T |
| Komagataella phaffii | 0948, 116945T |
| Kondoa malvinella | 1935, 1936T |
| Kondoa miscanthi | 10579T |
| Kondoa phyllada | 10581T |
| Kondoa subrosea | 10582T |
| Kondoa thailandica | 102560T |
| Kondoa yuccicola | 10596T |
| Koorchaloma bambusae | 100546 |
| Kordia aestuariivivens | 114499T |
| Kordia algicida | 100336T |
| Kordia antarctica | 109401T |
| Kordia periserrulae | 106077T |
| Kordia sp. | 113026 |
| Kosakonia oryzae | 103868 |
| Kosmotoga arenicorallina | 109616T |
| Kosmotoga olearia | 109654T |
| Kostermansinda nana | 109679, 112551 |
| Kozakia baliensis | 16664T, 16679, 16680, 16681, 103264, 103942 |
| Kramasamuha sibika | 30446, 32770 |
| Krasilnikovia cinnamonea | 112433, 112435, 112436 |
| Krasilnikovia sp. | 103696, 105345, 107592, 107595, 107598, 115551 |
| Krasilnikovozyma huempii | 100464T, 101845 |
| Kregervanrija delftensis | 10715T |
| Kregervanrija fluxuum | 0773T, 1784, 1785, 1786, 1787 |
| Kretzschmaria deusta | 104995 |
| Kribbella alba | 103561T |
| Kribbella aluminosa | 104151T |
| Kribbella amoyensis | 107914T |
| Kribbella antibiotica | 101882T |
| Kribbella catacumbae | 105864T |
| Kribbella flavida | 14399T |
| Kribbella ginsengisoli | 107353T |
| Kribbella hippodromi | 105866T |
| Kribbella jejuensis | 101070T |
| Kribbella karoonensis | 101884T |
| Kribbella koreensis | 101069T |
| Kribbella lupini | 101883T |
| Kribbella sancticallisti | 105865T |
| Kribbella sandramycini | 100341T |
| Kribbella solani | 101071T |
| Kribbella sp. | 101854, 102532, 102533, 102534, 106577, 113389, 116617, 116618, 116619, 116620, 116621, 116622 |
| Kribbella swartbergensis | 101885T |
| Kribbella yunnanensis | 103562T |
| Kribbia dieselivorans | 106261T |
| Krokinobacter eikastus | 100814T |
| Krokinobacter genikus | 100806, 100811T, 100815 |
| Krokinobacter sp. | 100805, 100807, 100808, 100809, 100810, 100812, 100813, 100816, 100818 |
| Kuehneromyces mutabilis | 30748, 110177 |
| Kuraishia capsulata | 0721T, 0974, 1768, 1769, 1770, 100352 |
| Kuraishia molischiana | 10296, 116927T |
| Kurthia gibsonii | 15534T |
| Kurthia sibirica | 101530T |
| Kurthia zopfii | 12083, 12084, 101529T |
| Kurtzmaniella fragi | 10759T |
| Kurtzmaniella quercitrusa | 1022T, 115875 |
| Kurtzmanomyces nectairei | 10118T |
| Kutzneria albida | 13901T |
| Kutzneria buriramensis | 107931T |
| Kutzneria chonburiensis | 110610T |
| Kutzneria kofuensis | 13989T |
| Kutzneria viridogrisea | 15561T |
| Kwoniella dejecticola | 111325 |
| Kwoniella dendrophila | 10114T, 111258, 111327 |
| Kwoniella mangrovensis | 111285 |
| Kwoniella sp. | 114011 |
| Kyrpidia tusciae | 15312T |
| Kytococcus sedentarius | 15357T |
