Phylum
A phylum (plural: phyla) is the third highest rank used in the biological taxonomy of all organisms. The second rank is kingdom and the highest is domain. Usually biologists count about 32 phyla of animals, about 14 of plants, and about 8 phyla of fungus, but definitions vary.
With genome analysis, groups of phyla have been put together based on evolutionary relationships. These are informal, not part of the standard classification.
Botanists usually prefer the word division instead of phylum.
Phylum Media
Amoeba proteus, visible are the contractile vacuole (circular) and the nucleus (somewhat dumbbell-shaped)
Scanning electron microscopic image of Podomonas kaiyoae grown under axenic conditions. AF, anterior flagellum; PF, posterior flagellum; T, tusk. Brackets indicate the acronemes. Arrows and arrowheads indicate the pseudopodium. Scale bar = 5 μm.
Aplanochytrium, Ectoplasmic network forming basket structure surrounding vegetative cells. This characteristic is unique to members of the genus Aplanochytrium.
Euglypha sp. / from Sanbongi-bog, from Yamagata, Yamagata Pref., Japan / SEM:JEOL JSM-6330F
Desmarella moniliformis (DIC image)
Ciliate: Paramecium bursaria Her. It has a mutualistic endosymbiotic relationship with green algae called Zoochlorella. The algae are clearly visible in ciliate cytoplasm. Light microscopy, differential interference contrast (DIC)
Rhodomonas_salina_CCMP_322
Morphology of Stygiellidae*Living cells observed using Differential Interference Contrast (A–R); Stygiella incarcerata strains NORMAR (C) and GOUVIA (D)
Typical euglenoid movement (metaboly) Picture courtesy of Rogelio Moreno.
Diatoms_through_the_microscope
