genus Tupaia
genus Tupinambis
genus Turbatrix
genus Turdus
genus Turnix
genus Turreae
genus Turritis
genus Tursiops
genus Tussilago
genus Tylenchus
genus Tympanuchus
genus Typha
genus Tyrannosaurus
genus Tyrannus
genus Tyto
genus Uca
genus Uintatherium
genus Ulex
genus Ulmus
genus Ulva
genus Uma
genus Umbellularia
genus Umbrina
genus Unio
genus Upupa
genus Urginea
genus Uria
genus Urocyon
genus Urocystis
genus Urophycis
genus Uropsilus
genus Urosaurus
genus Ursinia
genus Ursus
genus Urtica
genus Usnea
genus Ustilaginoidea
genus Ustilago
genus Uta
genus Utahraptor
| genus Utricularia
genus Uvularia
genus Vaccaria
genus Vaccinium
genus Valeriana
genus Valerianella
genus Vallisneria
genus Vanda
genus Vanellus
genus Vanessa
genus Vangueria
genus Vanilla
genus Varanus
genus Vedalia
genus Velociraptor
genus Venus
genus Veratrum
genus Verbascum
genus Verbena
genus Verbesina
genus Vernonia
genus Veronica
genus Verticillium
genus Vesicaria
genus Vespa
genus Vespertilio
genus Vespula
genus Vibrio
genus Viburnum
genus Vicia
genus Vicugna
genus Vidua
genus Vigna
genus Viminaria
genus Vinca
genus Vincetoxicum
genus Viola
genus Vipera
genus Vireo
genus Virgilia
| genus Viscum
genus Vitis
genus Vittaria
genus Viverra
genus Viverricula
genus Volvaria
genus Volvariella
genus Volvox
genus Vorticella
genus Vulpes
genus Vultur
genus Weigela
genus Welwitchia
genus Welwitschia
genus Wintera
genus Wisteria
genus Wolffia
genus Wolffiella
genus Woodsia
genus Woodwardia
genus Wyethia
genus Wynnea
genus Xanthium
genus Xanthomonas
genus Xanthorroea
genus Xanthosoma
genus Xenicus
genus Xenopus
genus Xenorhyncus
genus Xenosaurus
genus Xeranthemum
genus Xerobates
genus Xerophyllum
genus Xiphias
genus Xylaria
genus Xylocopa
genus Xylomelum
genus Xylopia
genus Xylosma
genus Xyphophorus
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