"T antiquus" was discovered in the Aguada de Lomas Horizon in 7 or 8 million year old strata; "T. natans" (the type species) from the Montemar Horizon lived around 6 million years ago (mya); "T. littoralis" from the Sud-Sacaco Horizon lived around 5 mya; "T. carolomartini" from the Sacaco Horizon lived between 3 and 4 mya; and "T. yaucensis" from the Yuaca Horizon lived 3 to 1.5 mya.Specimens were also found in the Bahía Inglesa Formation, the Coquimbo Formation, and the Horcón Formation in Chile.