J K K Kambrium Katoikogenic Keel L Lamellae Lamina Lateral Lateral eyes Lectotype Lyre Lithophile Longitudinal Lung Lymph (gland) Lymphoid Lyriform M Macroseta Mandibles Maxillen Mechanoreceptor Median Median eyes Mesic Mesophile Mesosoma Metasoma Metasoma Segment carination Metatypus Microseta Microvilli Mitochondria Movable Finger