| Taenia crassiceps | | Shapiro, Leo | en |
| Taenia hydatigena | | Shapiro, Leo | |
| Taenia multiceps | | Shapiro, Leo | en |
| Taenia saginata | | Shapiro, Leo | en |
| Taenia serialis | | Shapiro, Leo | en |
| Taenia solium | | Shapiro, Leo | en |
| Taenia taeniaeformis | | Shapiro, Leo | en |
| Tahina | | Schulz, Katja | en |
| Tahina spectabilis | | Campbell, Dana; Schulz, Katja | en |
| Taiwania cryptomerioides Hayata | | Frаnkis, Michаel | en |
| Tangara seledon (Statius Muller, 1776) | | Shapiro, Leo | en |
| Tantilla oolitica Telford, 1966 | | Shapiro, Leo | en |
| Tantulocarida | | Soulanille, Elaine | |
| Tardigrada | | Soulanille, Elaine | en |
| Tarentola delalandii DUMÉRIL & BIBRON 1836 | | Shapiro, Leo | en |
| Tarsius syrichta (Linnaeus, 1758) | | Shapiro, Leo | en |
| Taxodium mucronatum Ten. | | Frаnkis, Michаel | en |
| Tedania ignis | | Shapiro, Leo | en |
| Teleogryllus oceanicus | | Schulz, Katja | |
| Teleostei | | Soulanille, Elaine | |
| Telmatobufo bullocki Schmidt, 1952 | | Campbell, Dana | en |
| Terpsinoë americana (J.W. Bailey) Ralfs | | Chong, Steven; Shapiro, Leo | en |
| Terpsinoë musica Ehrenb. | | Chong, Steven; Shapiro, Leo | en |
| Terrapene carolina bauri Taylor, 1895 | | Shapiro, Leo | en |
| Tetranematichthys wallacei Vari & Ferraris, 2006 | | Shapiro, Leo | en |
| Tevnia jerichonana Jones, 1985 | | Soulanille, Elaine | |
| Thalassa saginata | | Schulz, Katja | |
| Thalassarche melanophris (Temminck, 1828) | | Soulanille, Elaine | |
| Thalasseus maximus | | Shapiro, Leo | en |
| Thalassia testudinum | | Shapiro, Leo; Schulz, Katja | en |
| Thaliacea | | Soulanille, Elaine; Shapiro, Leo | en |
| Thalictrum rochebrunianum | | Hammock, Jen | |
| Thelazia californiensis | | Shapiro, Leo | en |
| Thelazia callipaeda | | Shapiro, Leo | en |
| Theragra chalcogramma (Pallas, 1814) | | Shapiro, Leo | en |
| Thermus aquaticus Brock and Freeze 1969 (Approved Lists 1980) | | Shapiro, Leo | en |
| Thespesia populnea (L.) Soland. ex Correa | | Shapiro, Leo | en |
| Thunnus alalunga (Bonnaterre, 1788) | | Soulanille, Elaine | |
| Thunnus albacares (Bonnaterre, 1788) | | Soulanille, Elaine | en |
| Thunnus orientalis (Temminck and Schlegel, 1844) | | Shapiro, Leo | en |
| Thunnus thynnus (Linnaeus, 1758) | | Soulanille, Elaine; Hammock, Jen; Shapiro, Leo | en |
| Thysania agrippina Cramer 1776 | | Shapiro, Leo | en |
| Thysanoessa spinifera Holmes, 1900 | | Shapiro, Leo | en |
| Todus todus (Linnaeus, 1758) | | Shapiro, Leo | en |
| Toxocara canis (Werner, 1782) | | Shapiro, Leo | en |
| Toxocara cati | | Shapiro, Leo | en |
| Toxoplasma gondii | | Shapiro, Leo | en |
| Trachipleistophora | | Shapiro, Leo | en |
| Trachipleistophora anthropophthera | | Shapiro, Leo | en |
| Trachipleistophora hominis | | Shapiro, Leo | en |
