T. similis

T. similis may refer to:
 * Tabanus similis, a biting horsefly species in the genus Tabanus
 * Tarachodes similis, a praying mantis species
 * Trialeurodes similis, a whitefly species
 * Trichopsomyia similis, a hoverfly species in the genus Trichopsomyia
 * Troglohyphantes similis, the Kočevje subterranean spider, a spider species endemic to Slovenia
 * Tutelina similis, a jumping spider species in the genus Tutelina