Ka
Kabukiia, Kameschkoviella, Kamlacus, Kanfuqingia, Kaniniella,
†Kaolishania Sun 1924
- †Kaolishania pustulosa Sun 1924 [1]
Trilobita → Corynexochida → Leiostegioidea → Kaolishaniidae
†Kaolishaniella Sun 1935
Trilobita → Corynexochida → Leiostegioidea → Kaolishaniidae
Porodica †Kaolishaniidae Kobayashi 1935
- †Eokaolishania Wittke 1984 [2]
- †Kaolishania Sun 1924 [2]
- †Kaolishaniella Sun 1935 [2]
- †Liaotropis Schrank 1975 [2]
- †Mansuyia Nordsieck 2002 [2]
- †Mansuyites Shergold 1971 [2]
- †Palemansuyia Yuan and Yin 1998 [2]
- †Peichiashania Chang 1959 [2]
- †Tangjiaella Qiu 1984 [2]
Trilobita → Corynexochida → Leiostegiina → Leiostegioidea
†Kaotaia Lu, 1962
- †Kaotaia gedongensis Yuan and Zhao 1994 [3]
- †Kaotaia globosa Chang and Zhou 1974 [3]
- †Kaotaia longa Zhang et al. 1980 [3]
- †Kaotaia magna Lu 1945 [3]
- †Kaotaia prachina Peng et al. 2009 [3]
- †Kaotaia qinkouensis Zhou 1974 [3]
- Kaotaia transoersa sp. nov. [4]
Trilobita → Ptychopariida → PtychoparioideaAlokistocaridae Karagandoides, Karginella, Kasatchaspis, Kaskia, Kassinius, Kathwaia, Kaufmannella, Kayseraspis, Kazakhius, Kazelia, Kazelina, Kazellina,
Ke
Keeleaspis, Kegeliella, Keidelia, Kepingaspis, Kepisis, Kerbinella,
Kh
Khalfinella,
Ki
Kinderlania, Kingstoniidae, Kinsabia, Kirengelia, Kirkdomina, Kiskinella,
Kj
Kjerulfia Kiaer 1916
- Kjerulfia adaioides
- Kjerulfia granulata Raw, 1936
- Kjerulfia lata Kiaer, 1917
- Kjerulfia orcina Orlowski 1974
- Kjerulfia schwarzbachi Ahlberg & Bergstrom 1986
- Kjerulfia selandica C Poulsen 1969
- Kjerulfia serksi
Trilobita → Redlichiida → Holmiidae
Kl
Klabavia, Klotziella,
Kn
Knechtelia,
Ko
Kobayashella, Kobayashia, Kobayashipeltis, Kogenium, Kokuria, Kolbaspis, Kolbinella, Kolihapeltis, Kollarcephalus, Kolpura, Kolymella, Kolymoproetus, Komaspis, Kontrastina, Kooteniella, Kooteniellina, Koptura, Koraipsis, Korobovia, Kosovopeltis, Kotisopeltis, Kounamkites,
Kr
Krattaspis, Krolina,
Kt
†Ktenoura Lane, 1971
- Ktenoura aravaka Šnajdr, 1983†
- Ktenoura bicuspidata (Bouček, 1933)†
- Ktenoura retrospinosa Lane, 1971†
- Ktenoura retrospinosa oronapi Šnajdr, 1983†
Trilobita → Phacopida → Cheiruridae
Ku
Kueichowia, Kujandina, Kulmiella, Kuljumbina, Kunshanaspis,
Ky
Kymagnostus,