Kabulicornis

(EXTINCT)

Kadosactis

K-rosea

Danielssen 1890

Kadosanthus sulcatus

Carlgren 1934

Kadsura

Kahanga

Kaindipsocus

Kaisia

Kakadu

Kakodaimonia

Kakoselia anglia

(EXTINCT) (incertae sedis)

Kalidasia

Kalissus

Kallenbergia

(EXTINCT)

Kallima

K-albofasciata

K-alompra

K-buxtoni

K-horsfieldi

K-inachus

K-knyvetti

K-limborgii

K-paralekta

K-philarchus

K-spiridiva

Kallimini

Kallimoides rumia

Kalophryganeidae

(EXTINCT) (incertae sedis)

Kalophrynus

Kalotermes

Kalotermitidae

(Drywood termites)

Kaloula

Kaltanicupes

(EXTINCT)

Kaltanocoleus

(EXTINCT)

Kaltenbachiella

Kamimuria

Kamptomerus

Kanakaloma

Kanakopsis

Kanala

Kanetisa

(incertae sedis)

Kangiliacyathus

(EXTINCT)

Kaniska

Kansasia

(EXTINCT) (incertae sedis)

Kantharellidae

Kapalga

Kappapapillomavirus

Karadeniziella

Karakanocoleus

(EXTINCT)

Karanasa

K-abramovi

K-alpherakyi

K-astorica

K-bolorica

K-cadesia

K-decolorata

K-eburnea

K-goergneri

K-haslundi

K-hoffmanni

K-huebneri

K-incerta

K-josephi

K-kasakstana

K-kirgizorum

K-latifasciata

K-leechi

K-maureri

K-modesta

K-mohsenii

K-moorei

K-pamira

K-praestans

K-puengeleri

K-pupilata

K-regeli

K-rohtanga

K-safeda

K-straminea

K-talastauana

K-tancrei

K-voigti

K-wilkinsi

Karanisia clarki

(EXTINCT)

Karasbergia

Karauridae

(EXTINCT)0(incertae sedis)

Karoophasma biedouwensis

Karoophasma botterkloofensis

Karschiidae

Karsenia koreana

Karsimatherium

(EXTINCT)

Kartidris

K-ashima

K-fujianensis

K-galos

K-matertera

K-nyos

K-sparsipila

Karumia

Karumiinae

Kashmireumatidae

Kasibaeocera

Kasibelinurus

(EXTINCT)

Kassina

Kassininae

Kassinula

Katanganella

Katapaussus

Katapontisus brodiei

(EXTINCT) (incertae sedis)

Kathablepharids

(several genera of heterotrophic flagellates)

Kathetopodion

Kathroperla

Katiannidae

Katobatizon

Katreus

Kaudernitermes

Kaupifalco

(incertae sedis)

Kaveinga

K-(Angekiva)

K-(Ingevaka)

K-(Kaveinga s. str.)

K-(Vakeinga)

K-abbreviata

K-bellorum

K-cylindrica

K-fibulata

K-frontalis

K-histrio

K-kukum

K-lupata

K-lusca

K-marifuanga

K-nudicornis

K-occipitalis

K-okapa

K-orbitosa

K-parva

K-pignoris

K-poggii

K-setosa

K-stiletto

K-strigiceps

K-ulteria

K-waai

K-walfordi

Kaweshkarusa

Kayentachelys

(EXTINCT)

Kazakhophotina corrupta

(EXTINCT) (Mid-Cretaceous, Kzyl-Orda, Kazakhstan)

Kedestes

K-barberae

K-brunneostriga

K-callicles

K-chaca

K-heathi

K-lema

K-lenis

K-lepenula

K-macomo

K-malua

K-marshalli

K-michaeli

K-mohozutza

K-monostichus

K-nancy

K-nerva

K-niveostriga

K-pinheyi

K-protensa

K-rogersi

K-straeleni

K-sublineata

K-wallengrenii

Kekenodontidae

(EXTINCT)

Kelidus bolbus

(EXTINCT) (incertae sedis)

Kelleriidae

Kellicottia

Kemneria

(incertae sedis)

Kemneritermes

Kempnyella

Kempynia

Kenocoelus

Kenotyphlus

Kentriodontidae

(EXTINCT) (non-monophyletic) (incertae sedis)

Kentrogonida

Kenyanella

Kenyapotamus

(EXTINCT) (incertae sedis)

Kenyasus

(EXTINCT)

Kenyentulus

Keratella

Kermesidae

(gall-like coccids)

Kerplectus

Kerriidae

(lac scales)

Keteleeria

Ketupa

(Brown Fish Owl and relatives)

K-flavipes

(Tawny Fish Owl)

K-ketupu

(Buffy Fish Owl)

K-zeylonensis

(Brown Fish Owl)

Keuphyliidae

(F.)

Khetania mandibulata

(EXTINCT)

Khoikhoiiinae

Kiaeraspidida

(EXTINCT)

Kibdelosporangium

Kickxellales

Kickxellomycotina

(bread molds, Rhizopus, Mucor, etc.)

Kiera

Kigatrodes

Kilbuchophyllida

(EXTINCT)

Kilimatyphlus

Kimoda

Kineococcus

Kineosphaera

Kineosporia

Kinnaridae

Kinorhyncha

Kioloa

Kionotrochus

Kiotina

Kirghizocupes cellulosus

(EXTINCT)

Kirinia

K-climene

K-epaminondas

K-epimenides

K-eversmanni

K-roxelana

Kirkiaceae

Kirtland Shale aublysodontine

(EXTINCT)

Kishinouyeum

K-breve

K-cornuta

K-hepatica

K-jianfenglingensis

K-parvula

K-robusta

K-sinensis

K-stigmosus

Kissister

Kistneria

Kistneriella

Kistnerium

Kitasatospora

Kizylkuma

(EXTINCT)

Kladotyphlus

Klamathia

Klapalekia

Klebsormidiales

Kleptisister

Kliellidae

Klimeschia

Klugieae

Klugipaussus

Knoellia

Koalliella

(EXTINCT)0(incertae sedis)

Kobikeryx

(EXTINCT)

Kobrona

K-[species A]

K-croma

K-denva

K-edfina

K-eva

K-idea

K-infralutea

K-kobros

K-lexa

K-mirza

K-pansa

K-rasta

K-sebana

K-sota

K-tabella

K-vanda

K-vasna

K-wama

K-zadma

Kobus ellipsiprymnus

(waterbuck)

Kobus kob

(kob)

Kobus leche

(red lechwe)

Kobus megaceros

(Nile lechwe)

Kobus vardonii

(puku)

Kocuria

Koeberliniaceae

Kogiidae

(pygmy/dwarf sperm whales)

Koilomera

Kokiriidae

Kokomopteridae

(EXTINCT)

Kokomopteroidea

(EXTINCT)

Koleolepadidae

Kolkwitzia

Kolpochoerus

(EXTINCT)

Kolwezia

Komba robustus

(EXTINCT)

Komokiacea

(large marine amoebae)

Kondakovia

Filippova, 1972

Kongobatha

K-diademata

K-papua

Koompassia

Martiodendron, Androcalymma, Kalappia, (monophyly uncertain)

Korarchaeota

Kordiimonas gwangyangensis

Korenia margaritaceus

Danielssen 1890

Korovodes

Korscheltellus

K-gracilis

K-lupulina

Koruthaialos

K-butleri

K-focula

K-rubecula

K-sindu

Korynochoerus

(EXTINCT)

Kostea

Kotlassia

(EXTINCT)

Kotshkorkia laticeps

(EXTINCT) (incertae sedis)

Kotujellitinae

(EXTINCT)

Kraepelinia

Krameria

Kribbella

Kricogonia

K-cabrerai

K-lyside

Krishnacapritermes

Krithidae

Krohnitta

K-pacifica

K-subtilis

Krohnittella

K-boureei

K-tokiokai

Kroyeriidae

Kruia

Kubanochoerinae

(EXTINCT)

Kubanochoerus

(EXTINCT)

Kubanotragus

(EXTINCT)

Kuehneosauridae

(EXTINCT)

Kuiterichthys

Kumothales inexpectata

Kunsia

(water rat and South American giant rats)

Kupeus

Kuriporus

Kurthia

Kuschelidium

Kuschelinus insularius

Kuscheliotes

Kutzneria

Kuyangichthidae

(EXTINCT)

Kyarranus

Kyogle

Kyphopteryx

Kyrinion martilli

(EXTINCT)

Kyromyrma neffi

(EXTINCT) (incertae sedis)

Kyrtoxyna

Kytococcus

koala lemurs

(EXTINCT)